Meudon Solar Tower

The Meudon Solar Tower is a solar tower located at the Meudon Observatory in Meudon, France. The tower houses a solar telescope and spectrograph for observing the Sun.
Construction of the tower began in 1963, and it was commissioned in 1969. The shaft of the tower has a diameter of, and, at a height of, the tower has an observatory floor with a diameter of. The shaft of the tower consists of two concrete tubes which are separated by a air spelt in order to avoid wind induced vibrations.