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                                                                    EXHIBIT 23.3

                       CONSENT OF INDEPENDENT ACCOUNTANTS

         We hereby consent to the incorporation by reference in this
Registration Statement on Form S-4 of F.N.B. Corporation of our report dated
January 23, 2001 except for Note 22, which is dated February 26, 2001, relating
to the financial statements, which appears in Promistar Financial Corporation's
2000 Annual Report to Shareholders, which is incorporated by reference in its
annual report on Form 10-K for the year ended December 31, 2000. We also consent
to the reference to us under the heading "Experts" in such Registration
Statement.

/s/ PricewaterhouseCoopers LLP

Harrisburg, Pennsylvania
July 30, 2001