The Order of St. Basil the Great (OSBM Latin: Ordo Sancti Basilii Magni, Ukrainian: Чин Святого Василія Великого, Chyn Sviatoho Vasyliia Velykoho) also known as the Basilian Order of Saint Josaphat is an monastic religious order of the Greek Catholic Churches that is present in many countries and that has its Mother House in Rome. The order received approbation on August 20, 1631. Its monks, brothers, and priests work primarily with Ukrainian Catholics and are also present in other Greek-Catholic Churches in Central and Eastern Europe.