his studies with Damian at Vatopedi Monastery, and within the well-known collection of the heirmologion kalophonikon, entirely created by composers during the Ottoman period, and other not so well-known prints and sources not less than about 45 compositions are ascribed to him. The name "Bereketis" is derived from the Turkish word "bereket" (literally "abundance") with which he was known to reply to his students' eager requests for more kalophonic heirmoi or other mathemata to study. Already Balasios the Priest had made the heirmos kalophonikos to one of the most important genres of Ottoman Greek music. This genre was paraliturgical and therefore more experimental than the kalophonic way to compose stichera, which was already established by Late Byzantine composers like John Koukouzeles and Manuel Chrysaphes. 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. But there are handwritten heirmologia kalophonika notated in exegetic neume notation whose collection are not in every respect identical. The surviving works of Bereketis were transcribed from the old system of Byzantine parasemantic notation largely by Gregorios the Protopsaltis and his colleague Chrysanthos of Madytos near the beginning of the 18th century. The transcriptions by Gregorios had been republished in two volumes by Charalambos Karakatsanis. Contributions to the genres of the divine liturgies 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. After Bereketis, this style became more common and was used several times by later composers, including Nikolaos of Smyrna (in two works entitled "We Have Seen the True Light" and "Unfading Rose"), Monk Ioasaph of the monastery of Dionysiou on Mount Athos (very slow apolytikia of the despotic feasts of the Church), John the Protopsaltis, Theodore Phokaeus, Stephanos the Lambadarios, and Chourmouzios the Archivist of the Great Church. Bereketis also composed two large cycles of the papadic genre (cherubic hymn and Sunday koinonikon) that are formulaically valid, since the formulas were not written out in Middle Byzantine notation, they were rather part of the performance based on conventional melopœia. One cherubikon as well as one version of the Sunday koinonikon can be chanted in any of the eight Byzantine modes without