The GTC began its preliminary observations on 13 July 2007, using 12 segments of its primary mirror, made of Zerodur glass-ceramic by the German company Schott AG.
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The Gran Telescopio Canarias formally opened its shutters on July 24, 2009, inaugurated by King Juan Carlos I of Spain.
Gran Chaco | Gran Turismo | Gran Canaria | Gran Turismo (series) | Gran Sabana | Gran Turismo 5 | Gran Turismo 4 | Gran | Tryggve Gran | La gran aventura de Mortadelo y Filemón | John Willem Gran | Gran Turismo 2 | Gran Paradiso | El Gran Wyoming | Super Gran | La Gran Fiesta | Kristen Gran Gleditsch | Instituto de Astrofísica de Canarias | Gran Turismo (video game) | Gran Torre Santiago | Gran Sasso d'Italia | Gran Hamada | Grand Highway of the Gran Sasso and Monti della Laga National Park | El Pinacate y Gran Desierto de Altar Biosphere Reserve | Canarias | Wiera Gran | Valsequillo de Gran Canaria | Valle Gran Rey | Studebaker Gran Turismo Hawk | Spanish cruiser Canarias |