telescope, an optical telescope designed and manufactured by the German company Carl Zeiss AG. The size of the telescope mirror, the largest in Greece, combined with the sensitive detectors that the telescope is equipped with and the good atmospheric conditions of the site, makes it a very valuable tool for observing astronomical objects, of our Galaxy as well as the very faint distant objects located in the outskirts of the Universe. The current instrumentation includes an optical camera, a fiber fed spectrograph, and an instrument dedicated for observations of transiting exoplanets. More information on the telescope and the site can be found here. Kryonerion Astronomical Station 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. Newall Telescope The historic Newall 62.5 cm refractor is located at the Visitor Center of IAASARS in Penteli. The telescope was commissioned by Robert Stirling Newall (1812-1889), a wealthy Scottish engineer and amateur astronomer for his private observatory at Ferndene (Gateshead). The telescope was built by Thomas Cooke and in 1890 it was donated to the University of Cambridge. In 1957 it was donated to the National Observatory of Athens. Since 1995 the telescope is used as the main observational and public outreach facility of IAASARS. In 2013, after major renovation work, the telescope and the dome were fully restored to their past glory. Doridis Telescope The Doridis telescope was built in 1902 and remained as the largest telescope of Greece for 57 years. The telescope is named after the benefactor Dimitrios Doridis (Greek:Δημήτριος Δωρίδης), who financed its construction. It is a refractor with double achromatic lenses of 40 cm diameter