Thomas Fitzsimons, American merchant and statesman of Philadelphia, Pennsylvania, dies in Philadelphia on August 26, 1811. He represents Pennsylvania in the Continental Congress, the Constitutional Convention and the United States House of Representatives.

Fitzsimons is born in Ireland in 1741. In the mid-1750s his family immigrates to Philadelphia, where his father dies soon thereafter. He has enough education that he begins work as a clerk in a mercantile house. He marries Catherine Meade on November 23, 1761 and forms a business partnership with her brother George. Their firm, which specializes in the West Indies trade, operates successfully for over 41 years.

The firm is soon hit by the new revenue measures created to help support the finances of the British Empire, including the much reviled Stamp Act of 1765. Concerned with these ideas, Fitzsimons becomes active in the Irish merchant community in Philadelphia. He is a founding member of the Friendly Sons of St. Patrick in 1771 and later, in 1774, a steering committee organized to protest the Coercive Acts.

When Pennsylvania begins mobilizing and organizing a militia to fight the British, Fitzsimons is soon involved. He serves as captain of a company of home guards under the command of Colonel John Caldwalader. Initially his company serves as part of the soldiers who man posts along the New Jersey coast. His unit later serves as part of the reserve at the Battle of Trenton in 1776. Later in the war, he served on the Pennsylvania Council of Safety and heads a board to oversee the newly formed Pennsylvania Navy.

Fitzsimons enters active politics as a delegate to the Continental Congress in 1782 and 1783. He is a member of the Pennsylvania House of Representatives from 1786 until 1795. He is also a delegate to the U.S. Constitutional Convention in 1787. Although not a leading member of that convention, he supports a strong national government, the end of slavery, the United States Congress‘s powers to impose a tariff on imports and exports, the granting the House of Representatives, and power in equal to the United States Senate in making treaties. He is one of only two Catholic signers of the Constitution of the United States, the other being Daniel Carroll of Maryland.

After the Constitution is established, he serves in the first three sessions of the House of Representatives as a Federalist, where he favors protective tariffs and a strong navy, co-drafting the Naval Act of 1794 authorizing the original six frigates of the United States Navy. He fails to win re-election in 1794. This was partially attributed to public opinion turning against the Federalist Party over the forceful suppression of the Whiskey Rebellion. Although he never holds elective office again, he serves in 1798 as head of the committee of merchants overseeing the subscription-loan to build a warship at private expense for use in the Quasi-War.

In 1796, FitzSimons, along with James Innes of Virginia, is appointed by President John Adams to serve as one of two American members on the five-man debt commission charged under Article VI of the Jay Treaty with examining the claims of British subjects unable to collect debts incurred by Americans prior to the American Revolution. FitzSimons, Innes and Samuel Sitgreaves, who replaces Innes upon the latter’s death, become annoyed with the arguments used by their British counterparts to inflate the claims total. FitzSimons and Sitgreaves angrily and permanently seceded from the board in July 1799. The claims are eventually disposed of by a lump-sum payment, agreed upon by United States Minister to Britain Rufus King with British Foreign Secretary Robert Banks Jenkinson and approved by President Thomas Jefferson and the Senate in 1802.

While withdrawing from politics, Fitzsimons remains active in civic and business affairs. He serves as president of Philadelphia’s Chamber of Commerce, as a trustee of the University of Pennsylvania, Director of the Delaware Insurance Company and a director of the Bank of North America from 1781–1803. He is a founder of the bank and supports efforts to found Georgetown College. He also helps found the Insurance Company of North America.

Fitzsimons dies on August 26, 1811, in Philadelphia, where he is buried in the cemetery of St. Mary’s Roman Catholic Church, which is in present-day Independence National Historical Park.