Where does the standard "Book of Hours" for Orthodox Christians come from?
The only Horologion I've seen in person is the one produced by the Old-Rite Church of the Nativity in Erie, PA, which is "according to the typicon of the Holy Land and Great Lavra of our holy and God-bearing father Sabbas the Sanctified". Are all Horologions according to the St. Sabbas Monastery, or is this an "Old-Rite" thing.
Thank you and God bless.
Yes. Acctually, entire Byzantine rite today comes from redaction of Sabaite monks.