US National Archives
Nara: Founding Fathers: Delegates to the Constitutional Convention
The National Archives and Records Administration (NARA) provides biographies of all 55 delegates to the Constitutional Convention.
University of Groningen
American History: Biographies: Thomas Fitzsimons 1741 1811
Fitzsimons (FitzSimons; Fitzsimmons) was born in Ireland in 1741. Coming to America about 1760, he pursued a mercantile career in Philadelphia. The next year, he married Catherine Meade, the daughter of a prominent local merchant, Robert...
University of Pennsylvania
University of Pennsylvania Archives & Records: Thomas Fitzsimons
A brief biography of this signer of the Constitution. He later served as a trustee of the University of Pennsylvania.
US Army Center
U.s. Army Center of Military History: Thomas Fitzsimons
A nice biography of this delegate to the Constitutional Convention from Pennsylvania. He served in the Revolutionary Army and later was a Congressman.
US National Archives
Nara: Founding Fathers: Pennsylvania
Gives biographical details on the eight delegates from Pennsylvania to the Constitutional Convention: George Clymer, Thomas Fitzsimons, Benjamin Franklin, Jared Ingersoll, Thomas Mifflin, Gouverneur Morris, Robert Morris, and James Wilson.