The Calouste Gulbenkian Planetarium was designed by Frederico George and opened in 1965. It is situated between the west wing of the Jerónimos monastery and the modern extension of the Maritime Museum, also designed by George. The planetarium has a 25 metre diameter dome and there are astronomical shows throughout the day in Portuguese, English and French (check times with the museum). These shows explain the movement of stars and the solar system, but there are also specialist themes such as the Star of Bethlehem (Belém). This attraction is especially popular with children.