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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                               (Amendment No. 15)*

                            PARK NATIONAL CORPORATION
                                (Name of Issuer)

                        COMMON SHARES, WITHOUT PAR VALUE
                         (Title of Class of Securities)

                                   700658 10 7
                                 (CUSIP Number)

                                    12-31-05
             (Date of Event Which Requires Filing of this Statement)

Check the following box if a fee is being paid with this statement:

[X]  Rule 13d-1(b)

[ ]  Rule 13d-1(c)

[ ]  Rule 13d-1(d)

*    The remainder of this cover page shall be filled out for a reporting
     person's initial filing on this form with respect to the subject class of
     securities, and for any subsequent amendment containing information which
     would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

PERSONS WHO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED IN THIS FORM ARE
NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY VALID OMB CONTROL
NUMBER.


                                       1



CUSIP No. 700658 10 7

--------------------------------------------------------------------------------
1.   NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     PARK NATIONAL BANK, TRUSTEE
     BY: JOHN S. GARD, ASSISTANT VICE PRESIDENT
         AND TRUST OFFICER
--------------------------------------------------------------------------------
2.   CHECK THE APPROPRIATE BOX IF MEMBER OF A GROUP (SEE INSTRUCTIONS)
     (a)

     (b)
--------------------------------------------------------------------------------
3.   SEC USE ONLY

--------------------------------------------------------------------------------
4.   CITIZENSHIP OR PLACE OF ORGANIZATION
     U.S.A (NEWARK, OHIO)
--------------------------------------------------------------------------------
               5.  Sole Voting Power
                   1,441,174 COMMON SHARES
  Number of    -----------------------------------------------------------------
   Shares      6.  Shared Voting Power
Beneficially       -0-
 by Owned by   -----------------------------------------------------------------
    Each       7.  Sole Dispositive Power
  Reporting        1,058,674 COMMON SHARES
   Person      -----------------------------------------------------------------
    With:      8.  Shared Dispositive Power
                   107,202 COMMON SHARES
--------------------------------------------------------------------------------
9.   Aggregate Amount Beneficially Owned by Each Reporting Person
     1,441,174
--------------------------------------------------------------------------------
10.  Check if the Aggregate Amount in Row (9) Excludes Certain Shares (See
     Instructions)

--------------------------------------------------------------------------------
11.  Percent of Class Represented by Amount in Row (9)
     10.23%
--------------------------------------------------------------------------------
12.  Type of Reporting Person (See Instructions)

--------------------------------------------------------------------------------

HC
SEE ATTACHED "EXHIBIT 1"
SEE ATTACHED "EXHIBIT 2"


                                        2



                          INSTRUCTIONS FOR SCHEDULE 13G

INSTRUCTIONS FOR COVER PAGE

(l)        Names and I.R.S. Identification Numbers of Reporting Persons--Furnish
           the full legal name of each person for whom the report is
           filed--i.e., each person required to sign the schedule
           itself--including each member of a group. Do not include the name of
           a person required to be identified in the report but who is not a
           reporting person. Reporting persons that are entities are also
           requested to furnish their I.R.S. identification numbers, although
           disclosure of such numbers is voluntary, not mandatory (see "SPECIAL
           INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13G" below).

(2)        If any of the shares beneficially owned by a reporting person are
           held as a member of a group and that membership is expressly
           affirmed, please check row 2(a). If the reporting person disclaims
           membership in a group or describes a relationship with other persons
           but does not affirm the existence of a group, please check row 2(b)
           [unless it is a joint filing pursuant to Rule 13d1(k)(1) in which
           case it may not be necessary to check row 2(b)].

(3)        The third row is for SEC internal use; please leave blank.

(4)        Citizenship or Place of Organization--Furnish citizenship if the
           named reporting person is a natural person. Otherwise, furnish place
           of organization.

(5)-(9),   Aggregate Amount Beneficially Owned By Each Reporting Person,
(11)       Etc.--Rows (5) through (9) inclusive, and (11) are to be completed in
           accordance with the provisions of Item 4 of Schedule 13G. All
           percentages are to be rounded off to the nearest tenth (one place
           after decimal point).

(10)       Check if the aggregate amount reported as beneficially owned in row
           (9) does not include shares as to which beneficial ownership is
           disclaimed pursuant to Rule 13d-4 (17 CFR 240.13d-4] under the
           Securities Exchange Act of 1934.

(12)       Type of Reporting Person--Please classify each "reporting person"
           according to the following breakdown (see Item 3 of Schedule 13G) and
           place the appropriate symbol on the form:



Category                                Symbol
--------                                ------
                                     
Broker Dealer                             BD
Bank                                      BK
Insurance Company                         IC
Investment Company                        IV
Investment Adviser                        IA
Employee Benefit Plan, Pension Fund,
   or Endowment Fund                      EP
Parent Holding Company/Control Person     HC
Savings Association                       SA
Church Plan                               CP
Corporation                               CO
Partnership                               PN
Individual                                IN
Other                                     OO


Notes:     Attach as many copies of the second part of the cover page as are
           needed, one reporting person per page.


                                        3



           Filing persons may, in order to avoid unnecessary duplication, answer
           items on the schedules (Schedule 13D, 13G or 14D1) by appropriate
           cross references to an item or items on the cover page(s). This
           approach may only be used where the cover page item or items provide
           all the disclosure required by the schedule item. Moreover, such a
           use of a cover page item will result in the item becoming a part of
           the schedule and accordingly being considered as "filed" for purposes
           of Section 18 of the Securities Exchange Act or otherwise subject to
           the liabilities of that section of the Act.

           Reporting persons may comply with their cover page filing
           requirements by filing either completed copies of the blank forms
           available from the Commission, printed or typed facsimiles, or
           computer printed facsimiles, provided the documents filed have
           identical formats to the forms prescribed in the Commission's
           regulations and meet existing Securities Exchange Act rules as to
           such matters as clarity and size (Securities Exchange Act Rule
           12b-12).

SPECIAL INSTRUCTIONS FOR COMPLYING WITH SCHEDULE 13G

           Under Sections 13(d), 13(g), and 23 of the Securities Exchange Act of
           1934 and the rules and regulations thereunder, the Commission is
           authorized to solicit the information required to be supplied by this
           schedule by certain security holders of certain issuers.

           Disclosure of the information specified in this schedule is
           mandatory, except for I.R.S. identification numbers, disclosure of
           which is voluntary. The information will be used for the primary
           purpose of determining and disclosing the holdings of certain
           beneficial owners of certain equity securities. This statement will
           be made a matter of public record. Therefore, any information given
           will be available for inspection by any member of the public.

           Because of the public nature of the information, the Commission can
           use it for a variety of purposes, including referral to other
           governmental authorities or securities self-regulatory organizations
           for investigatory purposes or in connection with litigation involving
           the Federal securities laws or other civil, criminal or regulatory
           statutes or provisions. I.R.S. identification numbers, if furnished,
           will assist the Commission in identifying security holders and,
           therefore, in promptly processing statements of beneficial ownership
           of securities.

           Failure to disclose the information requested by this schedule,
           except for I.R.S. identification numbers, may result in civil or
           criminal action against the persons involved for violation of the
           Federal securities laws and rules promulgated thereunder.

GENERAL INSTRUCTIONS

A.         Statements filed pursuant to Rule 13d-1(b) containing the information
           required by this schedule shall be filed not later than February 14
           following the calendar year covered by the statement or within the
           time specified in Rules 13d-1(b)(2) and 13d2(c). Statements filed
           pursuant to Rule 13d-1(c) shall be filed within the time specified in
           Rules 13d-1(c), 13d-2(b) and 13d-2(d). Statements filed pursuant to
           Rule 13d-1(d) shall be filed not later than February 14 following the
           calendar year covered by the statement pursuant to Rules 13d-1(d) and
           13d-2(b).

B.         Information contained in a form which is required to be filed by
           rules under section 13(f) (15 U.S.C. 78m(f)) for the same calendar
           year as that covered by a statement on this schedule may be
           incorporated by reference in response to any of the items of this
           schedule. If such


                                        4



           information is incorporated by reference in this schedule, copies of
           the relevant pages of such form shall be filed as an exhibit to this
           schedule.

C.         The item numbers and captions of the items shall be included but the
           text of the items is to be omitted. The answers to the items shall be
           so prepared as to indicate clearly the coverage of the items without
           referring to the text of the items. Answer every item. If an item is
           inapplicable or the answer is in the negative, so state.

ITEM 1.

           (a)  Name of Issuer

                PARK NATIONAL CORPORATION

           (b)  Address of Issuer's Principal Executive Offices:
                50 NORTH THIRD STREET
                P.O. BOX 3500
                NEWARK, OH 43058-3500

ITEM 2.

           (a)  Name of Person Filing:

                PARK NATIONAL BANK, TRUSTEE

           (b)  Address of Principal Business Office or, if none, Residence

                SAME AS ITEM 1

           (c)  Citizenship

                U.S.A. (NEWARK, OHIO)

           (d)  Title of Class of Securities

                COMMON SHARES, W/O PAR VALUE

           (e)  CUSIP Number

                700658 10 7

ITEM 3.    IF THIS STATEMENT IS FILED PURSUANT TO SECTIONS 240.13D-1(B) OR
           240.13D-2(B) OR (C), CHECK WHETHER THE PERSON FILING IS A:

           (a)  [ ]   Broker or dealer registered under section 15 of the Act
                      (15 U.S.C. 78o).

           (b)  [ ]   Bank as defined in section 3(a)(6) of the Act (15 U.S.C.
                      78c).

           (c)  [ ]   Insurance company as defined in section 3(a)(19) of the
                      Act (15 U.S.C. 78c).

           (d)  [ ]   Investment company registered under section 8 of the
                      Investment Company Act of 1940 (15 U.S.C 80a-8).

           (e)  [ ]   An investment adviser in accordance with Section
                      240.13d-1(b)(1)(ii)(E);

           (f)  [ ]   An employee benefit plan or endowment fund in accordance
                      with Section 240.13d-1(b)(1)(ii)(F);

           (g)  [X]   A parent holding company or control person in accordance
                      with Section 240.13d-1(b)(1)(ii)(G);

           (h)  [ ]   A savings associations as defined in Section 3(b) of the
                      Federal Deposit Insurance Act (12 U.S.C. 1813);

           (i)  [ ]   A church plan that is excluded from the definition of an
                      investment company under section 3(c)(14) of the
                      Investment Company Act of 1940 (15 U.S.C. 80a-3);

           (j)  [ ]   Group, in accordance with Section 240.13d-1(b)(1)(ii)(J).


                                        5



ITEM 4.    OWNERSHIP.

           Provide the following information regarding the aggregate number and
           percentage of the class of securities of the issuer identified in
           Item 1.

           (a)  Amount beneficially owned:

                1,441,174.

           (b)  Percent of class:

                10.23%.

           (c)  Number of shares as to which the person has:

                (i)  Sole power to vote or to direct the vote

                     1,441,174.

                (ii) Shared power to vote or to direct the vote

                     -0-.

                (iii) Sole power to dispose or to direct the disposition of

                     1,058,674.

                (iv) Shared power to dispose or to direct the disposition of

                     107,202.

           Instruction. For computations regarding securities which represent a
           right to acquire an underlying security see Section 240.13d3(d)(1).

ITEM 5.    OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

           If this statement is being filed to report the fact that as of the
           date hereof the reporting person has ceased to be the beneficial
           owner of more than five percent of the class of securities, check the
           following [ ].

           Instruction: Dissolution of a group requires a response to this item.

ITEM 6.    OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON.

           If any other person is known to have the right to receive or the
           power to direct the receipt of dividends from, or the proceeds from
           the sale of, such securities, a statement to that effect should be
           included in response to this item and, if such interest relates to
           more than five percent of the class, such person should be
           identified. A listing of the shareholders of an investment company
           registered under the Investment Company Act of 1940 or the
           beneficiaries of employee benefit plan, pension fund or endowment
           fund is not required.

ITEM 7.    IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
           THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR
           CONTROL PERSON.

           If a parent holding company or Control person has filed this
           schedule, pursuant to Rule 13d-1(b)(1)(ii)(G), so indicate under Item
           3(g) and attach an exhibit stating the identity and the Item 3
           classification of the relevant subsidiary. If a parent holding
           company or control person has filed this schedule pursuant to Rule
           13d-1(c) or Rule 13d-1(d), attach an exhibit stating the
           identification of the relevant subsidiary.

ITEM 8.    IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

           If a group has filed this schedule pursuant to Section
           240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an
           exhibit stating the identity and Item 3 classification of each member
           of the group. If a group has filed this schedule pursuant to Section
           240.13d-1(c) or Section 240.13d-1(d), attach an exhibit stating the
           identity of each member of the group.

ITEM 9.    NOTICE OF DISSOLUTION OF GROUP

           Notice of dissolution of a group may be furnished as an exhibit
           stating the date of the dissolution and that all further filings with
           respect to transactions in the security reported on will be filed, if
           required, by members of the group, in their individual capacity. See
           Item 5.

ITEM 10.   CERTIFICATION

           (a)  The following certification shall be included if the statement
                is filed pursuant to Section 240.13d-1(b):


                                        6



                By signing below I certify that, to the best of my knowledge and
                belief, the securities referred to above were acquired and are
                held in the ordinary course of business and were not acquired
                and are not held for the purpose of or with the effect of
                changing or influencing the control of the issuer of the
                securities and were not acquired and are not held in connection
                with or as a participant in any transaction having that purpose
                or effect.

           (b)  The following certification shall be included if the statement
                is filed pursuant to Section 240.13d-1(c): By signing below I
                certify that, to the best of my knowledge and belief, the
                securities referred to above were not acquired and are not held
                for the purpose of or with the effect of changing or influencing
                the control of the issuer of the securities and were not
                acquired and are not held in connection with or as a participant
                in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Date 2/9/06


/S/ JOHN S GARD
-------------------------------------
Signature

PARK NATIONAL BANK, TRUSTEE
Name/Title

By: John S. Gard,
    Assistant Vice President
    and Trust Officer

The original statement shall be signed by each person on whose behalf the
statement is filed or his authorized representative. If the statement is signed
on behalf of a person by his authorized representative other than an executive
officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.

NOTE: Schedules filed in paper format shall include a signed original and five
      copies of the schedule, including all exhibits. See Section 240.13d-7 for
      other parties for whom copies are to be sent.

ATTENTION: INTENTIONAL MISSTATEMENTS OR OMISSIONS OF FACT CONSTITUTE FEDERAL
           CRIMINAL VIOLATIONS
           (SEE 18 U.S.C. 1001)


                                       7


                                  *"Exhibit 1"

                            PARK NATIONAL CORPORATION
                         Affiliate Bank Trust Department
                            Stock Ownership Breakdown
                                 As of 12/31/05



                              Sole Voting
                              -----------
                           
1. Century National Bank          26,677
2. Park National Bank          1,070,423
3. First Knox National Bank       78,965
4. Security National Bank        247,556
5. Richland Trust Company          7,733
6. Second National Bank            9,820

   Totals                      1,441,174



                                        8


                                  *"Exhibit 2"

                            PARK NATIONAL CORPORATION
                         Affiliate Bank Trust Department
                              Stock Ownership Plan



                              Sole Dispositive   Shared Dispositive
                              ----------------   ------------------
                                           
1. Century National Bank             21,610              1,885
2. Park National Bank               768,169             61,839
3. First Knox National Bank          65,329             13,302
4. Security National Bank           187,458             29,913
5. Richland Trust Company             6,288                263
6. Second National Bank               9,820                -0-

   Total                          1,058,674            107,202



                                        9