After the Colony of Maryland was created in 1634, colonists began seeking land grants along the Upper Patuxent River. In 1658 Phillip Calvert was granted Mount Calvert, a 1,000-acre manor. The town at Mount Calvert was established by the 1684 Act for the Advancement of Trade as plantations flourished and Maryland created towns to encourage settlement and establish official ports of entry. When Prince George's County was created in 1696, Mount Calvert became the county seat and was renamed Charles Town. By 1710, an Anglican Church, courthouse, and jail had been built, and at the riverfront wharves ships exchanged European goods for tobacco while ordinaries provided food, drink, and lodging to planters and merchants. In 1721, the county seat moved to Upper Marlboro, Charles Town gradually disappeared, and Mount Calvert became a ferry landing.