Heres the answer
The Maryland Toleration Act, also known as the Act Concerning Religion, was passed in 1649 by assembly of the Province of Maryland mandating religious toleration. The Calverts, who founded Maryland, needed to attract settlers to make the colonial venture profitable. In order to protect the Catholics from the immigrating Puritans and Protestants, the Calverts supported the Act Concerning Religion. The Act allowed freedom of worship for all Christians in Maryland.