Mercury fountain
A mercury fountain is a fountain constructed for use with mercury rather than water.
Mercury fountains existed in some castles in Islamic Spain; the most famous one was located at the Kasr-al-Kholaifa in Córdoba.Calder's ''Mercury Fountain''
The most noted example is a modern sculpture designed by the American artist Alexander Calder and commissioned by the Spanish Republican government for the 1937 World Exhibition in Paris. The artwork is a memorial to the siege of Almadén, which then supplied 60 percent of the world's mercury, by General Franco's troops. A direct counterpart is Picasso's Guernica, Calder's Mercury Fountain, now at the Fundació Joan Miró in Barcelona, is displayed behind glass for safety reasons.
