Nevertheless, the theological and liturgical concept of an eight-week cycle can be traced back to the cathedral rite of Jerusalem during the 5th century, and originally it was the Christian justification of Sunday as the eighth day after Sabbat.Frøyshov (2007, pp. 144-153). Peter Jeffery assumed a first phase during which the concept existed independently in various places, and a second phase during which Palestine became the leading centre of a monastic hymn reform. It established reform models which were also used later by the generation of John of Damascus.Peter Jeffery (2001). Despite that the first paragraph of the "Hagiopolites" ascribes the treatise to John of Damascus, it was probably written about 100 years after his death and went through several redactions during the following centuries.
