Pope Benedict XVI was 85 years old when he announced his resignation on February 11, 2013, which took effect on February 28, 2013. He cited a "lack of strength of mind and body" due to his advanced age as the reason for stepping down
. Born on April 16, 1927, Benedict XVI was the first pope to resign voluntarily in nearly 600 years, the last being Celestine V in 1294
