New York

St Patrick's Cathedral in NYC: This incredible Gothic white-marble-and-stone structure is the largest Roman Catholic cathedral in the United States, as well as the seat of the Archdiocese of New York. Designed by James Renwick, begun in 1859, and consecrated in 1879, St. Patrick's wasn't completed until 1906. The Cathedral seats about 2,200 people. After the death of the beloved John Cardinal O'Connor in 2000, Pope John Paul II installed Bishop Edward Egan, whom he elevated to cardinal in 2001.