The bombing of Rome in World War II took place on several occasions in 1943 and 1944, primarily by Allied and to a smaller degree by Axis aircraft, before the city was liberated by the Allies on June 4, 1944. Pope Pius XII was initially unsuccessful in attempting to have Rome declared an open city, through negotiations with U.S. President Franklin D. Roosevelt via Archbishop (later Cardinal) Francis Spellman. Rome was eventually declared an open city on August 14, 1943 (a day after the last Allied bombing raid) by the defending Italian forces. The first bombing raid occurred on July 19, 1943, when 690 aircraft of the United States Army Air Forces (USAAF) flew over Rome and dropped 9,125 bombs on the city. Though the raid targeted the freight yard and steel factory in the San Lorenzo district of Rome, Allied bombs also struck the district's apartment blocks, damaging the Papal Basilica and killing 1,500 people. Pius XII, who had previously requested Roosevelt not to bomb Rome due to "its value to the whole of humanity", paid a visit to the affected regions of the district; photographs of his visit later became a symbol of anti-war sentiments in Italy. The Allied bombing raids continued throughout 1943 and extended into 1944. In the United States, while the majority of the American media supported the bombing raids, many Catholic newspapers condemned them. In the 110,000 sorties that comprised the Allied Rome air campaign, 600 aircraft were lost and 3,600 air crew members died; 60,000 tons of bombs were dropped in the 78 days before Rome was captured by the Allies on June 4, 1944. Correspondences between Pius XII and Roosevelt Following the first Allied bombing of Rome on May 16, 1943 (three months before the German Army occupied the city), Pius XII wrote Roosevelt asking that Rome "be spared as far as possible further pain and devastation, and their many treasured shrines… from irreparable ruin." On June 16, 1943, Roosevelt replied: Bombing of Rome was controversial, and General Henry H. Arnold described Vatican City as a "hot potato" because of the importance of Catholics in the U.S. Armed Forces. British public opinion, however, was more aligned towards the bombing of the city, due to the participation of Italian planes in The Blitz over London. H.G. Wells was a particularly vocal proponent of doing so. Notable raids July 19, 1943 On July 19,