The Byzantine-Slav liturgical tradition emerged as an aggregate rite from the diverse liturgical practices of the Eastern Mediterranean from the early 4th century. This tradition developed around the city of Constantinople but was also influenced by the liturgical traditions of Jerusalem and the monasteries surrounding Jerusalem. While Constantinople remained the center of this tradition, it also found its home and developed in unique ways throughout the Mediterranean and the Balkan Peninsula, into Ukraine and Russia, and eventually throughout the world. The liturgical tradition itself weaves together the diverse practices of monastic and urban worship, creating very much a hybrid rite. The daily office, primarily drawn from monastic practices, utilizes a mix of invariable texts, prayers, psalmody, and composed hymns of ancient provenance as well as a wide array of variable hymns of different origins and genre. Throughout these services, the monastic elements stand side by side with remnants of the urban cathedral worship. The Divine Liturgy, the Eucharist service, has at its core prayers that go back to the classic patristic age of the church, the 4th and 5th centuries. The entire service, however, betrays multiple layers of influence on its development, ranging from practices of the imperial cult of late antiquity to popular piety. All these elements have come together through organic development and, at times, directed reform to form a vast liturgical tradition with rich textures and complex nuances of meaning.