The Palatine Gate (Porta Palatina) is a Roman Age city gate located in Turin, Italy. The gate provided access through the city walls of Julia Augusta Taurinorum (modern Turin) from the North side and, as a result, it constituted the Porta Principalis Dextra (Right-Side Main Gate) of the old town.
Built in the 1st century during the Augustan Age or the Flavian Age, the Porta Principalis Dextra may predate the construction of the city walls and was perhaps built on the location of an earlier Republican Age gate.
This facility served as a city gate for a long time and was turned into a castrum in the 11th century, although it lost the internal structure of the cavaedium over the centuries. In 1404, after centuries of incursions and partial decay, the western tower was rebuilt and both towers got completed with battlements for defensive purposes.
The Palatine Gate represents the primary archaeological evidence of the city's Roman phase, and is one of the best preserved 1st-century BC Roman gateways in the world. Together with the ancient theatre's remains, located a short distance away, it is part of the so-called Archaeological Park, opened in 2006.
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.