The new National Gallery show, entitled Leonardo da Vinci: Painter at the Court of Milan, is the biggest ever exhibit of the artist in UK.

Lady Gaga debuted her art (referencing the Duchamp Dada classic) at SHOWstudio exhibit in London.

Tham & Videgard built almost invisible mirrored Treehotel which recently opened 40 miles south of the Arctic Circle in Sweden.