May 15 (old calendar) / May 28 (new)

May 15 (old calendar) / May 28 (new) Ven. Pachomius the Great, Founder of Cœnobitic Monasticism (348 A.D.). St. Isaiah, Bishop and Wonderworker of Rostov (1090). The slain Crown Prince Dimitry of Uglich and Moscow (1591). Ven. Isaiah, Wonderworker of the Kiev Caves (1115). Ven. Pachomius—Abbot, and Silvanus, of Nerekhta (1384). Ven. Evfrosin (Euphrosynus), Abbot and Wonderworker of Pskov, and his disciple, Ven. Serapion (Pskov—1481). St. Achilles, Bishop of Larissa (4th