The Kryoneri Observatory was established in 1972. It is located in the district of Corinth in the northern Peloponnese at the top of mount Kyllini, close to Kryoneri village. It is equipped with a 1.2 m Cassegrain reflector telescope manufactured and installed on the site in 1975 by the British company Grubb Parsons Co., Newcastle. It was one of the largest telescopes in Greece, with many successful scientific observations during the past 35 years. The availability of other more modern facilities prompted phasing out the wide science use of the telescope. In 2014 a process of making an upgrade to the mechanics and electronics of the telescope begun, in order to facilitate the remote usage of the site for dedicated projects, such as the Near Earth Object via lunar impact monitoring project (NELIOTA) as well as for public outreach and educational purposes.