A long-lost mural: "'It was like discovering an Egyptian tomb,' says [architect Todd] Ernst. Within a week, they’d found a wall of those famous chunky curlicues, hidden behind a closet used for coats and AV gear. 'The fact that it actually survived is amazing,' says Ernst. 'It’s next to a sprinkler pipe and it’s made of shoe polish and alcohol, and it’s water soluble.'"
It can't be removed and no one knows how to preserve it so if you buy the loft, good luck.