STATE OF PENNSYLVANIA

COUNTY OF MERCER


POWER OF ATTORNEY



KNOW ALL MEN BY THESE PRESENTS, that I, Gary J. Roberts, President and
Chief Executive Officer of First National Bank of Pennsylvania, a national
banking association organized under the laws of the United States and
principal subsidiary of F.N.B. Corporation, do constitute and appoint James
Orie, David Mogle, Tito Lima and Brian Lilly as my true and lawful
attornies-in-fact, with full power of substitution, for me in any and all
capacities, to sign, pursuant to the requirements of Section 16 of the
Securities Exchange Act of 1934, as amended, any report on Form 3, Form 4,
or Form 5, respecting the securities of F.N.B. Corporation and to file the
same with the Securities and Exchange Commission, together with all
exhibits thereto and other documents in connection therewith, and to sign
on my behalf and in my stead, in any and all capacities, any amendments to
said reports, incorporating such changes as said attornies-in-fact deems
appropriate, hereby ratifying and confirming all that said
attornies-in-fact may do or cause to be done by virtue hereof.
The
authority of my attorney-in-fact shall be effective until I expressly
revoke it and file same with the Securities and Exchange Commission.
I
acknowledge that I have granted this power of attorney solely to make it
more convenient for me to comply with my reporting responsibilities under
Section 16 of the Exchange Act, that my granting of this power of attorney
does not relieve me of any of my responsibilities to prepare and file on a
timely basis all reports that I may be required to file under said Section
16, and that neither F.N.B. Corporation nor my attorney-in-fact has
assumed, or shall be deemed to assume, any of my responsibilities in that
regard.
IN WITNESS WHEREOF, I have hereunto set my hand and seal this 4th
day of March, 2005.

/s/Gary J. Roberts
Signature

Gary J.
Roberts
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