St. Mary's Basilica – officially The Church of the Immaculate Conception of the Blessed Virgin Mary – is a church of the Roman Catholic Diocese of Phoenix located at 231 North 3rd Street at the corner of East Monroe Street in downtown Phoenix, Arizona. It was built from 1902 to 1914 in a combination of the Mission Revival and Spanish Colonial Revival styles, and was dedicated in 1915. It replaced an earlier adobe church built in 1881 when the parish was founded. The parish has been staffed by the Franciscan Friars since 1895. The current church was elevated to a minor basilica by Pope John Paul II in 1985.