The Tour Mélusine is the keep of a former castle in the commune of Vouvant. This keep and watchtower, built at the end of the 12th century or the beginning of the 13th century, is the only vestige of the ancient castle of the Lords of Lusignan built in the present location. This castle was separated from the fortified town of Vouvant by a moat. A chapel, long gone, was leaning against the tower.
This tower, 45 m high from the ditch and with its cylindrical shape, is original from that time. Indeed, the majority of the castles of this region and of this time are of the 'Niortais' style (a square tower with round towers at each corner).
The keep has a square base, which indicates the height of the curtain wall that surrounded the courtyard of the castle, which is today the Place du Bail ('bail' meaning 'fortified enclosure').
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.