View of exterior of Sotheby's auction house new global headquarters on Madi...

'Sankthansnatt' (Midsummer Night) painting by Edvard Munch on display at So...

'America' the toilet cast from 101.2 kg of solid 18-karat gold by Maurizio ...

People examine Crowns (Peso Neto) by Jean-Michel Basquiat at Sotheby's auc...

Painting by Rene Magritte 'Le Jockey perdu' (The Lost Jockey) on display at...

Painting by Rene Magritte 'Le Jockey perdu' (The Lost Jockey) on display at...

Painting by Gustav Klimt 'Blumenwiese' (Blooming Meadow) on display at Soth...

Painting by Agnes Martin 'The Garden' on display at Sotheby's auction house...

Work by Henry Matisse 'Leda et le cygne' (Leda and Swan) on display at Soth...

'America' the toilet cast from 101.2 kg of solid 18-karat gold by Maurizio ...

View of exterior of Sotheby's auction house new global headquarters on Madi...

View of exterior of Sotheby's auction house new global headquarters on Madi...

Painting by Camille Pissarro 'Bords de l'Oise a Pontoise' (Banks of the Ois...

Work by Henry Matisse 'Leda et le cygne' (Leda and Swan) on display at Soth...

Yayoi Kusama sculpture 'Pumpkin' on display at Sotheby's auction house new ...

Painting by Vincent Van Gogh 'Piles de romans parisiens et roses dans une v...

Painting by Rene Magritte 'Le Jockey perdu' (The Lost Jockey) on display at...

'America' the toilet cast from 101.2 kg of solid 18-karat gold by Maurizio ...

Painting by Gustav Klimt 'Bildnis Elisabeth Lederer' (Portrait of Elisabeth...

Painting by Gustav Klimt 'Bildnis Elisabeth Lederer' (Portrait of Elisabeth...

View of exterior of Sotheby's auction house new global headquarters on Madi...

A visitor examines Keith Haring painting 'Untitled' on display at Sotheby's...

View of exterior of Sotheby's auction house new global headquarters on Madi...

People examine Crowns (Peso Neto) by Jean-Michel Basquiat at Sotheby's auc...

Work by Henry Matisse 'Leda et le cygne' (Leda and Swan) on display at Soth...

Painting by Gustav Klimt 'Waldabhang bei Unterach am Attersee' (Forest Slop...

Painting by Vincent Van Gogh 'Piles de romans parisiens et roses dans une v...

'Sankthansnatt' (Midsummer Night) painting by Edvard Munch on display at So...

Painting by Rene Magritte 'Le Jockey perdu' (The Lost Jockey) on display at...

View of exterior of Sotheby's auction house new global headquarters on Madi...

Painting by Frida Kahlo 'El sueno' (La cama) on display at Sotheby's auctio...

Work by Henry Matisse 'Leda et le cygne' (Leda and Swan) on display at Soth...