According to Romanian archaeologist Vasile Pârvan, the river Mousaios (Μουσαίος) mentioned in a letter from Ioannis Soranus, governor of Scythia Minor, to the archbishop of Caesarea Mazaca (about 400 AD) should be identified with the modern Buzău River. The document, kept in copies at the Vatican Library and San Marco Library in Venice, tells about the martyrdom of a Christian missionary by the name of Sabbas, drowned by the Goths in the river Mousaios. Beginning with the 20th century, Sabbas has been presented as the spiritual patron of the city of Buzău as well as of several local villages.