The St. George's (Yuriev) Monastery is usually cited as Russia's oldest monastery. It was used to be the most important in the medieval Novgorod Republic. It is part of the UNESCO World Heritage Site named Historic Monuments of Novgorod and Surroundings.
According to legend, the monastery was founded in the 11th century by Yaroslav the Wise (whose Christian name was George), but the first historically-reliable reference to it is from the early 12th century when the main church the Church of St. George (Georgieveskii Church) was founded (in 1119) by Prince Vsevolod Mstislavich of Novgorod and Pskov and Hegumen (roughly equivalent to a western prior) Kyuriak (Kirik) and built by the master Peter.
By the first third of the 13th century the hegumen had been raised to the status of an archimandrite (roughly equivalent to an abbot, i.e., the head of an important monastery, although the comparison with western abbots is imprecise).
The monastery was an important source for historical information on medieval Novgorod, as part of the Novgorod First Chronicle (the Synodal text) was compiled in the monastery.
The Church of St. George is one of the largest in Novgorod and its immediate environs. It is a tall white-stone church with three silver domes, which is unusual for Russian churches which usually have five domes (the main dome representing Christ, the four smaller ones representing the evangelists). Some remnants of the medieval frescoes remain, but most of the church was repainted in 1902. Among the frescoes is a large Christ Pantokrator in the main dome, a full-length portrait of Novgorodian Archbishop Feoktist, and another full-length (although smaller) portrait of Prince Vsevolod Mstislavich on the southwestern pier.
The monastery also has the Church of the Exaltation of the Cross in the northeastern corner of the monastery, with five blue domes and gold stars on it, built in the 18th century. The gateway into the monastery is crowned by a tall gold-domed tower which is visible from the city centre, including the Novgorod Kremlin two miles to the north.
The monastery was ravaged during the Soviet rule. Five of its six churches were destroyed by 1928; the monastery was closed in 1929. During the World War II, the buildings were occupied by the German and Spanish armed forces, and were seriously damaged. In 1991 the monastery was returned to the Russian Orthodox Church, and parts of it have been renovated since then. However the western part, including a church there, are still in ruins.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.