The recorded history of Maryland dates back to the beginning of European exploration, starting with the Venetian John Cabot, who explored the coast of North America for the Kingdom of England in 1498. After European settlements had been made to the south and north, the colonial Province of Maryland was granted by King Charles I to Sir George Calvert (1579–1632), his former Secretary of State in 1632, for settlement beginning in March 1634. It was notable for having been established with religious freedom for Roman Catholics, since Calvert had publicly converted to that faith. Like other colonies and settlements of the Chesapeake Bay region, its economy was soon based on tobacco as a commodity crop, highly prized among the English, cultivated primarily by African slave labor, although many