25hours Hotel Koln The Circlevs?

"The Cologne edition of this mod lifestyle hotel chain occupies a listed circular building (a former insurance company headquarters) and is bathed in a retro-futuristic design theme." Full review

"A modernist gem of a hotel set in the repurposed brutalist concrete shell of a former 1950s insurance building" Full review

"The vibe is retro-futuristic, in the classic late-modernist West German utopian style, full of pastel colors and rounded forms...rooms span from Medium to Gigantic" Full review

"We’re old enough to remember when the “design hotels” in Germany were among the most conservative in the world, all tasteful seriousness and aloof minimalism. That, of course, was before..." Full review