Charles Calvert, 3rd Baron Baltimore was an English peer and colonial administrator. He inherited the province of Maryland in 1675 upon the death of his father, Cecil Calvert, 2nd Baron Baltimore. He had been his father's Deputy Governor since 1661 when he arrived in the colony at the age of 24. However, Charles left Maryland for England in 1684 and would never return. The events following the Glorious Revolution in England in 1688 would cost Calvert his title to Maryland; in 1689 the royal charter to the colony was withdrawn, leading to direct rule by the British Crown. Calvert's political problems were largely caused by his Roman Catholic faith which was at odds with the established Church of England.

The Province of Maryland was an English and later British colony in North America from 1634 until 1776, when the province was one of the Thirteen Colonies that joined in supporting the American Revolution against Great Britain. In 1781, Maryland was the 13th signatory to the Articles of Confederation. The province's first settlement and capital was in St. Mary's City, located at the southern end of St. Mary's County, a peninsula in the Chesapeake Bay bordered by four tidal rivers.