From The Charter of the Massachussetts Bay Colony, 1691

“[T]here shall be a liberty of Conscience allowed in the Worship of God to all Christians (Except Papists) Inhabiting or which shall Inhabit or be Resident within our said Province or Territory.” You can try to read the whole thing here.

This may explain why Senators Ted Kennedy and John Kerry are such lousy Catholics. They're afraid of being run out of the state...