“Pentekostárion” (Greek:
Πεντηκοστάριον/Pentekostárion; Slavonic: Цвѣтнаѧ Трїωдь/Tsvyetnaya Triod)
is an Orthodox Christian Liturgical term, referring both to the 50-day
period from Páscha to Pentecostas well as to the service book providing
the texts for the Divine Services during this period.
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