In their section for the Sunday of Orthodoxy, they offer this introduction to Great Vespers on Saturday Evening:QuoteAfter the Psalm of Introduction (Psalm 103) and the Great Litany, we read Blessed is the man (the first kathisma of the Psalter).My Romanian Small Octoechos says that Blessed is the man is only sung when there is a vigil and at the vespers of a saint with polyeleos".And Blessed