May 21 (Eastern Orthodox liturgics)

May 20 - Eastern Orthodox Church calendar - May 22

All fixed commemorations below celebrated on June 3 by Orthodox Churches on the Old Calendar.

For May 21st, Orthodox Churches on the Old Calendar commemorate the Saints listed on May 8.

Sts Constantine and Helena, Holy Equals-to-the-Apostles.

Sts Constantine and Helena, Holy Equals-to-the-Apostles (Mosaic in Saint Isaac's Cathedral, St. Petersburg, Russia).

Stained glass window ( 1986 ) showing St Collen (Llangollen, Wales - St.Collen parish church)

Icon of the Saints of Murom.

King Constantin Brâncoveanu of Wallachia, and his sons (Church mural in Hurezi Monastery).

“Vladimir” Icon of the Most Holy Theotokos.

Mosaic icon of the Virgin of Tenderness, with the eponym "Episkepisis"("The Visitation"). From Triglia in Asia Minor, Church of Saint Basil (late 13th century)

Greek Sources

Russian Sources

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Wikipedia