Christo, the legendary public artist famous for his Wrapped Reichstag, plans to build the world’s largest sculpture out of oil drums in Abu Dhabi. “The Mastaba” is a pyramid-like structure made entirely from stacked, painted oil barrels, designed to tower above the sand dunes of the Gulf desert. It will take 30 months and hundreds of people to build the sculpture, which will be placed 100 miles outside Abu Dhabi in Al Gharbia. Although Christos said the idea for the sculpture was put together more than 30 years ago, conflict in the region prevented the piece from receiving approval. Christo is reportedly working with the crown prince’s elder brother, Sheikh Hamdan bin Zayed al-Nayhan to built the project. If completed, the $340 million project will be the largest permanent structure in the world–and the priciest.