Hugely influential art dealer whose galleries in Los Angeles and New York launched Minimalism and Land Art in the US

Marking the 150th anniversary of Piet Mondrian’s birth, this comprehensive exhibition explores the Dutch artist’s extraordinary capacity for reinvention

Here are the shows to visit beyond the Art Basel fair this week

The self-effacing artist's subtle work beat flashier rivals such as Damien Hirst to win the Turner Prize

The German school, one of the crucibles of Modernism, was a complex entity

Founder Walter Gropius had limited expectations of the school’s “beautiful sex”, but one student quietly subverted them with a new category: the textile artist

His yearly attack on the Turner Prize was more than just the bile of an ageing critic. To Sewell, art was a serious business, a thing apart