Parishioners of one of the churches decorate the temple with birch twigs in honor of the feast of the Holy Trinity. Parishioners in the temple during the festive service. The priest reads a sermon. Patriarch of Moscow and All Russia Alexy II comes out of the Assumption Cathedral of the Trinity-Sergius Lavra (Sergiev Posad, Moscow region), blesses the people. Trinity Cathedral of the Trinity-Sergius Lavra; interior decoration. Believers are praying. Religious procession around the cathedral. Paintings of the artist M.V. Nesterova. The film reveals the concept of the Holy Trinity: its three equally divine hypostases - God the Father, God the Son, the Holy Spirit.