The Cathedral Basilica of Saints Peter and Paul, head church of the Roman Catholic Archdiocese of Philadelphia, is located at 18th Street and the Benjamin Franklin Parkway, on the east side of Logan Square in Philadelphia. It was built between 1846 and 1864, and was designed by Napoleon LeBrun, from original plans by the Reverend Mariano Muller and the Reverend John B. Tornatore, with the dome and Palladian facade, designed by John Notman, added after 1850. The interior was largely decorated by Constantino Brumidi. The cathedral is the largest Catholic church in Pennsylvania, and was listed on the U.S. National Register of Historic Places in 1971. The cathedral has been the site of two papal Masses, one celebrated by Pope John Paul II in 1979, and the other by Pope Francis in 2015. The current rector of the cathedral is the Reverend Gerald Dennis Gill and the current archbishop of Philadelphia is Nelson J. Perez. History On the Feast of Saints Peter and Paul, June 29, 1846, Bishop Kenrick, then Bishop of Philadelphia, issued a pastoral letter announcing his determination to build a cathedral. Before Saint Peter and Paul was built, Philadelphia had two previous cathedrals; the first Catholic church in Philadelphia was Saint Joseph's, which was built in 1733. As the Catholic Church grew, a new church called Saint Mary's was built in 1763, which eventually was granted to be Philadelphia's first cathedral in 1810. As the Catholic Church continued to grow, Saint John the Evangelist was eventually made the new cathedral in 1838 when a larger church was needed, and Saint John's remained the cathedral until Bishop Kenrick began work on the Cathedral Basilica of Saints Peter and Paul. It was the bishop's intention to avoid running into debt, so the cathedral was long in building. He chose for the site a plot of ground adjoining the seminary at Eighteenth and Race Streets. Construction on the cathedral began shortly after the bishop's pastoral letter in 1846 but was not completed until 1864. The construction began less than 2 years after the Philadelphia Nativist Riots of 1844, which represented the height of Anti-Catholicism and Know-Nothingism in Philadelphia and, according to local lore, greatly influenced the design of the building. The cathedral was built with only very high clerestory windows that according to parish histories would inhibit vandalism. In order to protect the windows of the Cathedral Basilica from possible