Horologion
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The horologion or horologium, also known by other names, is the book of hours for the Eastern Orthodox and Eastern Catholic Churches. It provides the acolouthia, the fixed portions of the Divine Servi
Horologion in Romanian
Christ Pantocrator mosaic from Hagia Sophia 2744 x 2900 pixels 3.1 MB
Canonical hours
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In the practice of Christianity, canonical hours mark the divisions of the day in terms of fixed times of prayer at regular intervals. A book of hours, chiefly a breviary, normally contains a version
Opening verse from a Book of Hours Domine labia mea aperies et os meum annuntiabit laudem tuam, c. 1520
Breviary of Beatrice van Assendelft, 1485
Cistercians singing the Liturgy of the Hours at Heiligenkreuz Abbey
Traditionally, monastic communities pray the Divine Office in the choir of the church.