The Variables of Divine Liturgy Proper to Sundays and Various Feast Days and Church Knowledge” is a collection of writings of eminent clergy who served in the Armenian Apostolic Church mostly in the 20th century. The book contains essential knowledge about our major feasts such as Christmas, Lent, Holy Week, Easter, Transfiguration, the Feasts of Holy Cross and Virgin Mary. It also covers various important topics, such as: the Armenian faith, our Badarak, the issue of reform in the Armenian Church, the ecumenical relationships with other churches, the structure of our hierarchy, etc.