The Hamburg 1-meter reflector telescope (first light 1911) was one of the biggest telescopes in Europe at that time, and by some measures the fourth largest in the World. The Observatory also has an old style Great Refractor (a "Großen Refraktor"), a long telescope with a lens (60 cm/~23.6 in aperture) with a tube focal length of 9 meters (~10 yards), and there is also a smaller one from the 19th century that has survived. Another historical item of significance is the first and original Schmidt telescope, a type noted for its wide-field views.