August 16 (Eastern Orthodox liturgics) - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/August_16_(Eastern_Orthodox_liturgics)
Jump to Post-Schism Orthodox saints - ... New Martyrs King Constantin Brâncoveanu of Wallachia, and his four sons Constantine, Stephen, Radu, and Matthew, ...
May 21 (Eastern Orthodox liturgics) - Wikipedia, the free encyclopedia
https://en.wikipedia.org/wiki/May_21_(Eastern_Orthodox_liturgics)
May 20 - Eastern Orthodox Church calendar - May 22. All fixed commemorations below ... 16th century); New Martyrs King Constantine Brancoveanu of Wallachia and his four sons Constantine, Stephen, Radu, and Matthew, and his counsellor Ianache ... It is commemorated on May 21, as well as June 23 and August 26.