The big stone that appeared recently in front of Lumen belongs to ISRIC. The object was moved from Duivendaal to the campus. The stone is a clump of bauxite from Moengo, Suriname, and was a present from the Royal Tropical Institute. Stephan Mantel from ISRIC made sure the stone was added to the list of open-air objects around the campus, making it officially a work of art. The stone will eventually be mounted next to the entrance to the new ISRIC museum; building work for the museum is due to start any day now.