The Constantinian peace afforded the opportunity for new spacious church buildings, and a more public celebration of liturgy with more elaborate forms. The Spanish nun Egeria, after a visit to the Holy Land, reveals a well-established liturgical calendar, and describes the various weekday services in the holy city. This chapter traces the growth of liturgy in the ancient churches of Jerusalem, Antioch, East Syria, Egypt, Rome, and the West. At Rome, 15-23 December seems to have been regarded as the end of the agricultural year, perhaps suggesting the theme of the end of history. Christians assembled on the Lord's Day, which seemingly established itself quickly as the weekly worship day. In addition the Didache mentioned fasting on Wednesdays and Fridays. During the fourth century one can see the development of particular feasts and seasons. Egeria mentions Lent, Easter, Pentecost and Epiphany, and indicates that her community in Spain was well aware of these feasts and seasons.