Auction Houses/I-art AuctionI-art AuctionArticles related to I-art AuctionWorks of ArtAn Abstract Work by Hilma af Klint Heads to AuctionPaintingAcoustic Painting: Max Oppenheimer’s First String Quartet at the DorotheumJewellery & GemsIn Conversation with Simon Hofer of Hofer Antikschmuck