The anagrams, or more generally, the mathemata and morphologically related kalophonic forms of Byzantine melopoeia, constitute the artistic creations by which Psaltic Art is known in all its splendour and becomes an object of admiration. Kalophony as ars nova was born following the recovery of the city of Constantinople after the Latin occupation of Byzantium (AD 1204-1261) during the long reign of Andronicus II (1282-1328) and reached its final form in the first half of the fourteenth century. During the years 1300-1350, four key composers and teachers of the Psaltic Art...