This photo-of-the-day is from Palais des
Papes in Avignon, France. I'll let Wikipedia tell the story:
"It is one of the largest and most important medieval Gothic
buildings in Europe. Once a fortress and palace, the papal residence
was a seat of Western Christianity during the 14th century. Six papal
conclaves were held in the Palais, leading to the elections of
Benedict XII in 1334, Clement VI in 1342, Innocent VI in 1352, Urban V
in 1362, Gregory XI in 1370 and Benedict XIII in 1394. Since 1995, the
Palais des Papes has been classified, along with the historic center
of Avignon, as a UNESCO World Heritage Site, for its outstanding
architecture and historical importance for the Papacy."