Studite monastic reforms reshape chant booksJan 1, 850Labels: Stoudios Monastery, Heirmologion, SticherarionByzMusicBritannica
Earliest surviving Byzantine neume manuscripts appearJan 1, 900Labels: Byzantine neumes, 10th-century manuscriptsBritannica
Coislin notation reaches an advanced diastematic stageJan 1, 1106Labels: Coislin notation, PalaeobyzantineByzChantPDFBritannica
Middle Byzantine “Round” notation becomes widely usedJan 1, 1177Labels: Middle Byzantine, Round notationByzChantPDFBritannica
Fourth Crusade sacks Constantinople and disrupts musical lifeApr 12, 1204Labels: Fourth Crusade, ConstantinopleBritannicaWiki1204
Empire restores Constantinople, enabling renewed court worshipJan 1, 1261Labels: Restoration of, Byzantine courtPapadicOct
Papadic reform formalizes professional chant pedagogyJan 1, 1280Labels: Papadike, John GlykysPapadicOctJISOCM
Kalophonia emerges as a major late-Byzantine styleJan 1, 1300Labels: Kalophonia, Late ByzantineJISOCMDOAJ
John Koukouzeles shapes papadic and kalophonic practiceJan 1, 1320Labels: John Koukouzeles, Imperial singingKoukouzelesJISOCM
Hagia Sophia cantor John Kladas writes theory worksJan 1, 1350Labels: John Kladas, Hagia SophiaKladasBritannica
John Laskaris builds chant education network in Venetian CreteJan 1, 1411Labels: John Laskaris, Venetian CreteLaskaris
Fall of Constantinople ends Byzantine Empire; chant continues elsewhereMay 29, 1453Labels: Fall of, Mehmed IIBritannicaJISOCM
Manuel Chrysaphes completes chant-theory treatise at AthosJul 1, 1458Labels: Manuel Chrysaphes, Mount AthosPrincetonHymnology