The solar telescope GREGOR was built by a German consortium consisting of Institute for Solar Physics (KIS), Leibniz Institute for Astrophysics Potsdam (AIP) and Max-Planck Society represented by the Max Planck Institute for Solar System Research (MPS) in Göttingen. The Institute for Astrophysics of Göttingen University was a member until 2008. The Instituto de Astrofisica de Canarias (IAC) and the Astronomical Institute of the Academy of Sciences of the Czech Republic contributed to telescope and instruments. GREGOR has been in scientific operation since 2013.

With an aperture of 1.5m, GREGOR is the largest European solar telescope for the visible and near IR spectral regime.