Beginning with the holy Prince Vladimir (July 15), it was the pious
custom of Russian princes to build a church in honor of their patron
saint. Thus, St Vladimir (in Baptism Basil) built at Kiev and Vyshgorod
temples dedicated to St Basil the Great (January 1).
Izyaslav I (1054-1068) (in Baptism Demetrius) built a church and
monastery at Kiev in the name of the Holy Great Martyr Demetrius
(October 26). Prince Yaroslav the Wise (in Baptism George) started to
build a church and men’s monastery in honor of his patron saint, the
Holy Great Martyr George (April 23). He also built a church named for
his wife’s patron saint, the Holy Great Martyr Irene (May 5). The temple
in honor of the Great Martyr George was consecrated by St Hilarion,
Metropolitan of Kiev (October 21), and a yearly commemoration was
established in honor of this event.