The Odeillo solar furnace is the world largest solar furnace. It is situated in Font-Romeu-Odeillo-Via, in the department of Pyrénées-Orientales, in south of France. It is 54 m high and 48 m large, and includes 63 heliostats. It was built between 1962 and 1968, and started operating in 1970, and has a power of one megawatt. It serves as a science research site studying materials at very high temperatures. Work on the construction of the Great Solar Oven of Odeillo lasted from 1962 to 1968 for a commissioning in 1970.