Rjukan–Notodden Industrial Heritage Site is created to protect the industrial landscape around Lake Heddalsvatnet. The landscape is centered around the plant built by the Norsk Hydro to produce fertilizer from atmospheric nitrogen. The complex also includes hydroelectric power plants, transport systems, including railways, transmission lines and factories, and workers' accomodation and social institutions in the towns of Notodden and Rjukan.
In the 1900s, Norway experienced rapid industrial development through the availability of cheap hydroelectric power. Kristian Birkeland developed a method to extract nitrogen from the air, which, after an initial trial in Notodden in 1907, looked superior to existing technologies. Nitrogen was needed to produce fertilizers. Norsk Hydro was founded in 1905, and industrial development began in the Eastern Telemark region, previously an underdeveloped and underpopulated agricultural area. To produce fertilizers, it was essential to build factories, power stations, infrastructure for workers, as well as facilities for exporting the production. The fertilizers, artificial salpetre, eventually surpasses the Chilean naturally mined salpeter, at the time the most widely used fertilizer.
At the beginning of construction, in 1907, the power was provided by the Svelgfoss Hydroelectric Power Station, which at the time was the largest in Europe and the second larges at the world. The station is still in operation. Subsequently, two more station were built. Vemork, built on a waterfall near Rjukan, in 1911 was the largest power station in the world. A plant producing heavy water and most famous for the 1943 sabotage events (Operation Gunnerside) was built nearby. The original building of the station has been destroyed, but the station is in operation. Another power plant, Såheim Hydroelectric Power Station, started operation in Rjukan in 1915. The building survived but the station operates elsewhere.
One of the 36 towers of the salpetre factory's towerhouse, which was in operation between 1911 and the 1980s, has been conserved and is protected as a cultural monument.
In 1925, 80% of all apartments in Rjukan (1230 in total) were controlled by the Norsk Hydro. red brick apartment buildings dominated, others were houses with individual gardens.
The site was placed on the tentative World Heritage list on 26 November 2011 together with the Odda–Tyssedal Industrial Heritage Site. In 2015 it was placed on the World Heritage list.
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.