Petros Bereketis

He, together with Panagiotes the New Chrysaphes, Balasios the Priest and Germanos Bishop of New Patras was one of the most influential figures in the evolution of the Byzantine psaltic art following the fall of Constantinople in 1453, although he never was associated with the Patriarchate in Fener.

During his lifetime, which is approximately supposed to be between 1665 and 1725, while Chrysanthos mentioned that he served there in the time of the Archon Protopsaltis at the Great Church of Christ of Panagiotis Halatzoglou and his Lampadarios John Trapezountios (1727–1748).

The surviving compositional corpus left by Bereketis is extensive, spanning works across all ecclesiastical genres including communion chants (koinonika for both Sundays and weekdays), asmatic doxologies, cherubic hymns, kratemata, pasapnoaria, polyelea, doxastica and katavasies for various feast days.

[5] The Ottoman collection of heirmoi kalophonikoi became more popular than the Byzantine stichera kalophonika within the living tradition of Orthodox chant, and it was published in the transcription of Gregorios the Protopsaltis by Theodoros Phokaeos.

[8] The eight-mode, two choir structure format employed by Bereketis in his notable setting of "O Theotokos and Virgin" was inspired by a similar composition ("More Honourable than the Cherubim") by Constantine of Aghialos, written several centuries earlier.