Below are a few gems of info Myth coppied from the article
The first thing to know about Maryland's Religious Freedom Byway is that religion in Colonial Maryland was rarely free. ... They [Catholics] had to have their prayers and services on the sly. Eventually, there were Jews and Quakers and Methodists. Of course, they didn't have an easy time, either.' Maryland has long promoted itself as the birthplace of American religious freedom, and it is true that Lord Baltimore decreed that his fellow Catholics should be allowed to practice their faith alongside their Protestant neighbors in the colony he founded in Southern Maryland in 1634. ...[However] Cecil Calvert, the second Lord Baltimore, directed that his co-religionists 'suffer no scandal nor offense to be given to any of the Protestants … [that] all acts of Roman Catholic religion [be] done as privately as may be … [and that] all the Roman Catholics [be] silent upon all occasions of discourse concerning matters of religion.' ...By the end of the 17th century, the Calvert family's influence had waned, Anglicanism was made the official religion of Maryland, and the capital was moved to Annapolis. Catholics would not be able to worship openly or participate in government again until the U.S. Constitution became the law of the land.