1 EXHIBIT 24 POWER OF ATTORNEY KNOW ALL MEN BY THESE PRESENTS, that each person whose signature appears below does hereby constitute and appoint SUSAN SCHMIDT BIES, JAMES F. KEEN, CLYDE A. BILLINGS, JR., and TERESA A. FEHRMAN jointly and each of them severally, his or her true and lawful attorney-in-fact and agent, with full power of substitution and resubstitution, for him or her and in his or her name, place and stead, in any and all capacities, to execute and sign the Registration Statement on Form S-4 to be filed with the Securities and Exchange Commission, pursuant to the provisions of the Securities Act of 1933, by First Tennessee National Corporation ("Corporation") relating to the issuance of its Common Stock, par value $2.50 per share, pursuant to the Stock Exchange Agreement dated as of June 15, 1994, by and among the Corporation, First Tennessee Bank National Association, Emerald Mortgage Company ("Emerald"), and the shareholders of Emerald and, further, to execute and sign any and all pre-effective and post-effective amendments thereto and to file the same, with all exhibits thereto and other documents in connection therewith, with the Securities and Exchange Commission, granting unto said attorneys-in-fact and agents, and each of them, or their or his or her substitute or substitutes, full power and authority to do and perform each and every act and thing requisite or necessary to be done in and about the premises, as fully to all intents and purposes as the undersigned might or could do in person, hereby ratifying and confirming all the acts that said attorneys-in-fact and agents, or any of them, or their or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof. Signature Title Date --------- ----- ---- Ralph Horn Chief Executive Officer August 22, 1994 - --------------------------- (principal executive officer) Ralph Horn and a Director Susan Schmidt Bies Executive Vice President August 22, 1994 - --------------------------- and Chief Financial Officer Susan Schmidt Bies (principal financial officer) James F. Keen Senior Vice President and August 22, 1994 - --------------------------- Controller (principal James F. Keen accounting officer) Jack A. Belz Director August 22, 1994 - --------------------------- Jack A. Belz Robert C. Blattberg Director August 22, 1994 - --------------------------- Robert C. Blattberg J. R. Hyde, III Director August 22, 1994 - --------------------------- J. R. Hyde, III Joseph Orgill, III Director August 22, 1994 - --------------------------- Joseph Orgill, III Richard E. Ray Director August 22, 1994 - --------------------------- Richard E. Ray Page 1 of 2 2 Vicki G. Roman Director August 22, 1994 - --------------------------- Vicki G. Roman Michael D. Rose Director August 22, 1994 - --------------------------- Michael D. Rose William B. Sansom Director August 22, 1994 - --------------------------- William B. Sansom Gordon P. Street, Jr. Director August 22, 1994 - --------------------------- Gordon P. Street, Jr. Ronald Terry Director August 22, 1994 - --------------------------- Ronald Terry Page 2 of 2