praefectus urbi (prefect of the city)
(later referred to as the eparch of the city) Αdministrator and virtual governor of Constantinople in the Early/Middle Byzantine Era. He was responsible for the surveillance and the harmonius life of the Capital. One of his responsibilities was to control the commercial and manufacturing activities of Constantinople. After 1204, however, the office began to diminish, while from the 14th century, his responsibilities were assumed by two officers, the so-called kephalatikeuontai of the capital.

Synaxarion of Constantinople
A compilation of brief accounts on every saint that was celebrated during a liturgical year, arranged by months. It was one of the first and most thorough compilation of synaxaria and it is considered a valuable source for the Byzantine studies. Its compilation must be dated to the 10th century and was probably linked to the tradition of the Church of Constantinople. It was the model for many synaxaria compiled later (such as the Menologion of Basil II), and it was completed or slightly altered in some parts through the years. It was published in 1902 by the Belgian scholar Hippolyte Delehaye (Synaxarium ecclesiae Constantinopolitanae e codice Sirmondiano [Bruxelles 1902]).