The headquarters of the former Crypto AG in Steinhausen (ZG) produced cipher machines for decades. The German foreign intelligence service BND and the US CIA secretly bought the company in 1970. They caused many states to be supplied with machines with weaker encryption that could be decrypted by the BND and CIA. The successor company Crypto International AG was most recently based there. The Swiss company was at the center of a suspected espionage affair. In the summer of 2020, the company was closed due to a federal export ban. Since then, the company premises have been abandoned, but the last traces are still visible, and in a few years the factory and administration building, built in 1966, is to be demolished; around 200 apartments are planned on the site. With my photo report in spring 2021, I documented the abandoned building and area before it disappeared.