Laetentur Caeli may refer to:
The final verses of the Latin version of Psalm 96 The final verses of the Latin version of Tollite Hostias in Oratorio de Noël by Camille Saint-Saëns. The Bull of Union with the Greeks issued by Pope Eugene IV in 1439 A letter from Cyril of Alexandria to John I of Antioch written in April 433 that contains the Formula of Reunion