FESTAL TRIODION -
) - One of the basic liturgical books of the Orthodox Church, which contains the hymns and prayers for the period from the Holy Pasch (Resurrection) through the Sunday of All Saints (the first Sunday after Pentecost). There are two types of Festal Triodion: a reader's version, which contains only texts, and a singer's version, in which the texts are supplied with musical notation. The earliest notated versions of the Festal Triodion in the Russian Church arose in the 12th c., as part of the so-called "Triodic Sticherarion." The first Russian printed edition of the Festal Triodion with musical notation -- the "Pentikostarion, sirech' Piatidesiatnitsa" -- was published in 1772 in square notation.