This monastery was founded by the Patrician Studius, probably in the mid-5th century. He built the church of the Forerunner (St. John the Baptist) and established in it the order of Akoimetoi (the "sleepless" monks), who prayed in shifts around the clock.
Rules for the Studite monks are attributed to the abbot Theodore (759-826) who also played a leading role in the defense of icon-veneration against the Iconoclasts. The monastery church was used as a mosque by the Ottoman Turks. In recent centuries it has suffered from fires and earthquakes, so that today only the outer walls of the church stand up to the height of the roof, as well as the north colonnade of the nave. For pictures and more information on the history of the monastery, see Wikipedia at web address 1. For a digital reconstruction, see Byzantium 1200 at web address 2.
[1] This much Adler indicates as belonging to the original Suda; the rest she shows as marginal additions.
[2] For Nakoleia, in Phrygia, see nu 19. The Archistrategos would probably be St. Michael (see alpha 4191, note) or another archangel.