The Church of Saint Panteleimon is a late Byzantine church in Thessaloniki and a UNESCO World Heritage Site.
The church lies in the eastern part of the old city, near the Tomb of Galerius, at the junction of Iasonidou and Arrianou streets. Its current dedication to Saint Panteleimon was given to the church after the end of Ottoman rule in 1912, and its original dedication is therefore disputed. In Ottoman times, it was converted into a mosque in 1548 and became known as Ishakiye Camii, which in the prevailing scholarly interpretation points to an identification with the late Byzantine Monastery of the Virgin Peribleptos, also known as the Monastery of Kyr Isaac after its founder Jacob, who was the city's metropolitan bishop in 1295–1315 and became a monk with the monastic name of Isaac.
A counter-argument however supports the theory that the present church is unrelated to the Peribleptos Monastery, and that it was converted into a mosque ca. 1500, when the city's kadı (judge), was Ishak Çelebi, whom the mosque was named after. However, the church's architecture and decoration, which date to the late 13th/early 14th centuries, appear to support the former view.
The church is of the tetrastyle cross-in-square type, with a narthex and a (now destroyed) ambulatory that is connected to two chapels (still extant). Very few of the building's original wall paintings survive. Ottoman remains include the base of the demolished minaret and a marble fountain.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.