Montmayeur Castle was built in 1271 by Anselmo and Aimone D´Avise on a steep promontory over the orographic right bank of the Dora Valgrisenche, in a position dominating the entrance to the valley of the same name.
Today it is reduce to ruins, but preserves the cylindrical tower, crowned with beautiful swallowtail battlements. It is still possible to see the remains of the ancient castle and the boundary wall.
Access is only possible on foot, along the path that leaves from the village of Grand Haury, just above Arvier.
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.