Ice hotel opens in Swedish Lapland – in pictures — theguardian.com

The 7,5°Rø suite is divided into 12 frames, each leaning against the one in front at an angle of 7.5 degrees. The gradient creates a spiral-like twist and an illusion of infinity. The artists – Wolfgang Lachow, Sebastian Scheller and Anja Kilian – were inspired by the Danish astronomer Ole Christensen Rømer, who invented a thermometer that measures in Rø units. According to this scale, water turns to ice at 7.5 degrees Rø.

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