The papal election of May 26–29 August 1261 took place after the death of Pope Alexander IV and chose Pope Urban IV as his successor.
The papal election of 12 October 1264 - 5 February 1265 was convened after the death of Pope Urban IV and ended by electing his successor Pope Clement IV.
Tannhäuser, a prominent German Minnesänger and poet, was a contemporary of Pope Urban IV—the pope died in 1264, and the Minnesänger died shortly after 1265.
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Audi filia et and De sinu patris were two letters written by either Pope Urban IV (1165–1264) or Pope Clement IV (1200–1268).
Exultavit cor nostrum is a letter, also known as a Papal bull, from Pope Urban IV to the Mongol Ilkhanate leader Hulagu in 1263/1264.
Among other things, he was tasked by Pope Urban IV in 1263 by the papal bull Exultavit cor nostrum to investigate the legitimacy of an alleged ambassador with the Mongol Empire, John the Hungarian.