Charles Carroll was unique. He was the only Roman Catholic to sign the Declaration of Independence and he outlived all the other signers. At his death, he was considered the wealthiest citizen in America. His cousin founded Georgetown University. On this day, Nov. 4, 1800, Charles Carroll penned a letter to James McHenry, the signer of the Constitution for whom Fort McHenry was named. Charles Carroll wrote: "Without morals a republic cannot subsist any length of time; they therefore who are decrying the Christian religion, whose morality is so sublime and pure ... are undermining the solid foundation of morals, the best security for the duration of free governments."