St. Thomas Manor (1741) is a historic home and Catholic church complex located near Port Tobacco, Charles County, Maryland. Today, the manor house complex is recognized as the oldest Jesuit residence in the world to have been continuously occupied by that order. The mission settlement of Chapel Point was started in 1641 by Father Andrew White, S.J., an English Jesuit missionary. He administered to the Potapoco Native Americans, some of whom he converted to Catholicism. Established in 1662, this is the oldest continuously active Roman Catholic parish in the Thirteen Colonies of North America founded by Great Britain. With the consecration in 1794 of Bishop John Carroll, St. Thomas became the first Roman Catholic see in the United States.

In 1794 it was at St. Thomas Manor that John Carroll was invested in his robes as the first Catholic bishop of the United States of America, after the nation gained independence in the Revolutionary War. (He later traveled to London for official consecration as a bishop by the Vicar Apostolic.) This investiture established St. Thomas as the first Roman Catholic see in the United States.[2]
The St. Thomas complex was also the site of the revival of the Jesuit order in the United States in 1805, after it had been suppressed by the Catholic Church in 1773. Three American priests took their vows at St. Ignatius Church.[2]
en.wikipedia.org/wiki/St._Thomas_Manor