The Church of Saint Nicholas Orphanos is an early 14th-century Byzantine church in Thessaloniki.
The church's name, 'Saint Nicholas the Orphan', is first attested in the 17th and 18th centuries, and presumably refers to its otherwise unknown ktetor (founder). From its interior decoration, the building is dated to the period 1310–1320. The church originally formed part of a monastery, traces of which (remnants of a gate) survive to the east.
The church was originally built as a simple, single-aisled edifice with a wooden gabled roof. Later, aisles were added on three sides. They form an ambulatory, under whose floor several graves have been found. The masonry features irregular layers of brick and stone, with a few ceramics on the eastern side and brick decoration on the eastern and western sides. In the interior, the central aisle is connected to the others with double openings decorated with reused late antique capitals. The church's original marble templon survives.
The church is most notable for its frescoes, contemporary with the church's construction, which cover almost the entire interior surface. The frescoes are an example of the Thessalonican school at the height of the 'Palaiologan Renaissance', and their creator may be the same who decorated the Hilandar monastery in Mount Athos in 1314. The church has been linked to the Serbian king Stephen Uroš II Milutin (r. 1282–1321), who is known to have sponsored churches in the city, on account of the depiction in the main aisle of St George Gorgos, the Serbian ruler's patron saint, and of St. Clemens of Ohrid, a favourite motif of the Serbian churches.
The monastery continued functioning throughout the Ottoman period. The frescoes were uncovered in 1957–1960 during restoration works.
References:The Clementinum is a historic complex of buildings in Prague. Until recently the complex hosted the National, University and Technical libraries, the City Library also being located nearby on Mariánské Náměstí. The Technical library and the Municipal library have moved to the Prague National Technical Library at Technická 6 since 2009. It is currently in use as the National Library of the Czech Republic.
Its history dates from the existence of a chapel dedicated to Saint Clement in the 11th century. A Dominican monastery was founded in the medieval period, which was transformed in 1556 to a Jesuit college. In 1622 the Jesuits transferred the library of Charles University to the Klementinum, and the college was merged with the University in 1654. The Jesuits remained until 1773, when the Klementinum was established as an observatory, library, and university by the Empress Maria Theresa of Austria.