YNIQ says This summerhouse was built for [Stefan Persson](https://www.forbes.com/profile/stefan-persson/?list=billionaires#2ab993a55dbe) by [Skälsö Arkitekter](http://skalso.se) in Gotland, Sweden. Some english info [here](https://www.wallpaper.com/architecture/a-former-military-bunker-is-commandeered-as-a-superior-subterranean-summerhouse) from when it was constructed two years ago.
YNIQ says
This summerhouse was built for [Stefan Persson](https://www.forbes.com/profile/stefan-persson/?list=billionaires#2ab993a55dbe) by [Skälsö Arkitekter](http://skalso.se) in Gotland, Sweden.
Some english info [here](https://www.wallpaper.com/architecture/a-former-military-bunker-is-commandeered-as-a-superior-subterranean-summerhouse) from when it was constructed two years ago.