The Fiac in Paris attracts Michael Heizer, Hauser & Wirth, a monumental Calder, 100 starfish and an organic gallerist

Mantegna, Bellini. A sublime exhibition in London. 90 artworks reveal the admiration and competition between two Renaissance geniuses

Beyeler Foundation in Basel: The fascinating mystery of the paintings of Balthus, as told by his widow Setsuko

Stefan Simchowitz: the thorn in the side of the American art market answers 6 questions in less than one minute and claims speculation is a good thing