January 27 (Eastern Orthodox liturgics) - Wikipedia
https://en.wikipedia.org/wiki/January_27_(Eastern_Orthodox_liturgics)
Jan. 26 - Eastern Orthodox Church calendar - Jan. 28. All fixed commemorations below are ... Venerable Titus the Soldier, monk of the Kiev Caves Monastery ( 11th century); New Martyr Demetrius at Constantinople (1784); Saint Demetrius ...
List of Russian saints (until 15th century) - Wikipedia
https://en.wikipedia.org/wiki/List_of_Russian_saints_(until_15th_century)
Saints
in the Russian Orthodox Church are confirmed by canonization which
lists the decedent ... The local canonization is performed in either one
church or monastery, or in one eparchy, .... that period, such as the vast majority of Kiev Caves monks or Metropolitan Michael I. ..... Venerable Abraham of Rostov (11th century)