Complex sentence: St. Mary's Cathedral Basilica (1847) in Galveston, Texas is the primary cathedral of the Archdiocese of Galveston-Houston and the motherchurch of the Catholic Church in Texas.
Split into simpler sentences: St. Mary's Cathedral Basilica (1847) is a Roman Catholic place of worship situated in Galveston, Texas, United States. It is the primary cathedral of the Archdiocese of Galveston-Houston and the motherchurch of the Catholic Church in Texas.