Agains tradition, Pope Benedictus XVI (born Joseph Aloisius Ratzinger; Marktl, Bavaria, Germany16 April 1927) resigned from his mission as the head of the Catholic Church. He served 265 days: 24 April 2005 - 28 February 2013.

Ratizinger leaves a Church in crisis after many scandals of sexual abuse, most of them during the time he led the Congregation for the Doctrine of the Faith (1981 to 2005).

After his resignation Ratizinger flew to Castel Gandolfo to spend some time before moving into the newly renovated Mater Ecclesiae monastery for his retirement from public eyes.

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In the image, the door of Castel Gandolfo are the border between the public life as Pope and the retired life as emeritus, and the entry to Purgatory.

Purgatory (Lat., "purgare", to make clean, to purify) in accordance with Catholic teaching is a place or condition of temporal punishment for those who, departing this life in God's grace, are, not entirely free from venial faults , or have not fully paid the satisfaction due to their transgressions.

/.../ There are several passages in the New Testament that point to a process of purification after death. /.../
St. Paul in 1 Corinthians 3:11-15:

"For other foundation no man can lay, but that which is laid; which is Christ Jesus. Now if any man build upon this foundation, gold, silver, precious stones, wood, hay stubble: Every man's work shall be manifest; for the day of the Lord shall declare it, because it shall be revealed in fire; and the fire shall try every man's work, of what sort it is. If any man's work abide, which he hath built thereupon, he shall receive a reward. If any man's work burn, he shall suffer loss: but he himself shall be saved, yet so as by fire."

Source: Catholic Encyclopedia