How did Bishop John Carroll affect the Catholic Church?

Archbishop John Carroll was a Jesuit and became the first Bishop in the brand new United States. His see was at Baltimore, where he built the first seminary, with the help of the Sulpician Fathers. Bishop Carroll pretty much started the Catholic Church in the United States, started the first seminary and trained the first priests. For a more complete account, read about him at the article in the Catholic Encyclopedia at the link below: