Charles Benedict Calvert (August 23, 1808 – May 12, 1864) was an American politician who was a U.S. Representative from the sixth district of Maryland, serving one term from 1861 to 1863.

The Stiers had fled to America in the late eighteenth century as French Republican armies occupied their hometown of Antwerp.

On April 9, 1844, Morse and Vail successfully tested their device by transmitting a message from the nation's capital to the Calvert home, Riversdale.

[5] The outbreak of the American Civil War provided an opportunity for Calvert to enter national politics as an opponent of secession.

[7][8] After leaving office, he resumed agricultural pursuits until his death on May 12, 1864, at Riversdale, and is interred in Calvert Cemetery.