Pope Benedict XVI (Latin: Benedictus PP. XVI; Italian: Benedetto XVI, born Joseph Alois Ratzinger on 16 April 1927) was the 265th Pope, the spiritual head of the Catholic Church, and as such, Sovereign of the Vatican City State. He was elected on 19 April 2005 in a papal conclave, celebrated his papal inauguration mass on 24 April 2005, and took possession of his cathedral, the Basilica of St. John Lateran, on 7 May 2005. On 11 February 2013, Pope Benedict announced his resignation in a speech in Latin before the cardinals, citing a "lack of strength of mind and body" due to his advanced age. His resignation became effective on 28 February 2013. He is the first pope to resign since Pope Gregory XII in 1415, and the first to do so on his own initiative since Pope Celestine V in 1294. As pope emeritus, Benedict retains the style of His Holiness, and the title of Pope, and will continue to dress in the papal colour of white. Pope Benedict XVI has both German and Vatican citizenship. He succeeded Pope John Paul II, who died on 2 April 2005 (and with whom he had worked before the interregnum). Benedict XVI was also the Bishop of Rome, a position traditionally attached to the papacy.