The Katskhi pillar is a natural limestone monolith. It is approximately 40 metres high, and overlooks the small river valley of Katskhura.
The rock, with visible church ruins on a top surface measuring c. 150 m2, has been venerated by locals as the Pillar of Life and a symbol of the True Cross, and has become surrounded by legends. It remained unclimbed by researchers and unsurveyed until 1944 and was more systematically studied from 1999 to 2009. These studies determined the ruins were of an early medieval hermitage dating from the 9th or 10th century. A Georgian inscription paleographically dated to the 13th century suggests that the hermitage was still extant at that time. Religious activity associated with the pillar was revived in the 1990s and the monastery building had been restored.
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.