The MONS Telescope has 50cm diameter and was constructed by the University of Mons (Belgium) in 1972 for night observation purposes.
It is located at Observatorio del Teide on Tenerife

Tenerife

Tenerife is the largest and most populous island of the seven Canary Islands, it is also the most populated island of Spain, with a land area of 2,034.38 km² and 906,854 inhabitants, 43% of the total population of the Canary Islands. About five million tourists visit Tenerife each year, the...

, and is operated by the Instituto de Astrofísica de Canarias

Instituto de Astrofísica de Canarias

The Instituto de Astrofísica de Canarias is an astrophysical research institute located in Tenerife in the Canary Islands, Spain. It was founded in 1975 at the University of La Laguna.It operates two astronomical observatories in the Canary Islands:...

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The telescope was at first used by the Department of Astrophysics in "Universidad de La Laguna" and is still oriented for educational purposes. Many colleges request observation time for their student's projects. It's also used by groups of amateur astronomers.