It’s 65 feet high and 190 feet long at its widest point. It weighs 600 tons. Christo’s newest sculpture is called “The London Mastaba.” The word “Mastaba” relates to ancient Egyptian tombs. Christo’s Mastaba is a temporary installation, floating in a lake in London’s Hyde Park until September 23, 2018. Some people really like the size, the colors, and the whole idea. Other people don’t. This article was written by someone who saw it soon after it was installed on the Serpentine Lake.