The Arkazhy Monastery was one of the most important monasteries of medieval Novgorod Republic. All that remains of it today is the Church of the Assumption of the Mother of God, which is visible on the road out to the Yuriev Monastery. The foundations of the medieval monastery were excavated by Soviet archaeologists in 1961.
The monastery was founded by and takes its name from Arkadii, who founded it in 1153 prior to his being elected bishop of Novgorod (1156–1165). He initially built a wooden church to the Assumption. This church was subsequently rebuilt in stone in 1188 by Simeon Dibakevits and was consecrated by Archbishop Gavriil (1186–1192) the following year. Other boyars, including several posadniks, helped add to the monastery over the centuries. In 1206, Posadnik Tverdislav Mikhailovich built the Church of Simeon Stylites over the gates of the monastery. In 1395, Isaak Onkifov had the Church of St. Michael the Archangel rebuilt in stone, and it was overhauled in 1407 by Posadnik Yuri Dmitrievich and his cousin Yakov.
In addition to patronizing the monastery, at least two posadniks, in fact a father and son, became monks there: in 1206, Posadnik Mikhailko was shorn in the schema, the highest level of Eastern Christian monasticism, in the Arkazhsky Monastery and died there, having taken the monastic name Mitrofan. In 1222, his son Tverdislav was also shorn a monk in the monastery after he had taken ill.
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.