Next to the power station in Thissio stands the Byzantine church of Agii Asomati, a typical sample of ecclesiastical architecture of the 11^th century, after which the square was named.It is a simple four-columned cross-in-square church with a dome.On this spot was once located "Gyftoporta", one of the gates of the wall of Athens.The whole region was inhabited by gipsies, who had come from Egypt in the early 15^th century and abandoned Athens along with the Turks after the Revolution.