Pope Benedict XVI was the head of the Catholic Church and sovereign of the Vatican City State from 19 April 2005 until his resignation on 28 February 2013. Benedict's election as pope occurred in the 2005 papal conclave that followed the death of Pope John Paul II. Benedict chose to be known as "Pope emeritus" upon his resignation, and he retained this title until his death in 2022.

The resignation of Pope Benedict XVI took effect on 28 February 2013 at 20:00 CET, following his announcement of it on 11 February. It made him the first pope to relinquish the office since Gregory XII was forced to resign in 1415 to end the Western Schism, and the first pope to voluntarily resign since Celestine V in 1294.