Basilica of the National Shrine of the Immaculate Conception

Located on the campus of the Catholic University of America, the Basilica of the National Shrine of the Immaculate Conception is the largest Catholic church in the United States and one of the largest in the world. Construction began in 1920 and the basilica is noted for its extensive mosaic work, multiple chapels honoring international Catholic communities, and Romanesque-Byzantine architectural influences. It functions as a national sanctuary and hosts major liturgical events and pilgrimages.