Artists v fascists, Khmer Rouge horrors, fab flowers and an eye-popping nude the week in art

"In the 1930s Europe was descending into extremism. Artists as well as poets and intellectuals tried to fight the fascists, reveals this exhibition based on a recent book about the AIA (Artists International Association). Towner Eastbourne, until 18 October"

"A photographic story of survival and the preservation of memory under the Khmer Rouge, told by Charles Fox and Prum Sisaphantha (Pantha). The Wiener Holocaust Library, London, until 15 May"

"Newly attributed drawings from the workshop of the great 15th-century artist Rogier van der Weyden are among the northern Renaissance wonders here. British Museum, London, until 20 September"

"Sylvia Sleigh painted friends, critics, strangers anyone she found interesting and attractive. A new show of the Welsh artist brings together seven of her beautiful people, including this mesmerising portrait of Johanna Lawrenson, the elegant brunette with enviably long legs inspired by Sleeping Venus."

Exhibitions in Europe present art shaped by political conflict and historical memory. Artists International Association material connects creative work with resistance to fascism in 1930s Europe. A photographic project documents survival and preservation of memory under the Khmer Rouge. Newly attributed drawings from Rogier van der Weyden’s workshop expand knowledge of northern Renaissance art. Katharina Grosse’s large-scale technicolor installations and paintings emphasize immersive visual experience. A flower-focused selection traces modern art from 1900 to today. Additional highlights include Sylvia Sleigh’s portraiture of people she found interesting, and contemporary works ranging from Venice-related practice to defiant origami presented at the Venice Biennale, alongside debates about hate politics and participation.

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