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.
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According to the historian Jean Richard, its wording "bore signs of the intermediary of a western scribe, probably the Ilkhan's Latin notary, Rychaldus."
O meu coração não tem cor | Ecce Cor Meum | Cor Pot | Cor, Blimey! | Nel cor più non mi sento | Exultavit cor nostrum | Cor Caroli |
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.