While the Gemeentemuseum in The Hague is closed until fall of ’98 for major restoration, the museum’s huge Mondrian holdings won’t go unseen. In this survey, the Tate Gallery shows a selection of sixty-odd works from the Dutch museum’s collection of the modern master’s canvases. Strong in the early and middle periods of his work, the Gemeentemuseum’s holdings are complemented by significant loans to pinpoint the artist’s development from early landscapes in the Netherlands to new beginnings in New York. Bridget Riley, assisted by Sean Rainbird of the Tate, has made this dynamic choice from the work of an artist who has long been one of the British painter’s invincible heroes. July 26-Nov. 30

— Richard Shone

Cathy de Monchaux’s exquisitely crafted sculptures are the answer to a control freak’s prayers. Born in London in 196o, she’s made her name with a series of frankly erotic, mischievous variations on the theme of the vagina dentata: symmetrical, wall-mounted mechanomorphs fashioned from velvet, leather, and brass. Until now, de Monchaux has been largely known for her relatively small-scale work. But for her first solo show in a major public space, she is working in an expansive mode: in addition to new wall-mounted pieces, part of the Whitechapel’s Lower Gallery is being transformed into what de Monchaux calls “dream architecture.” May 30-July 27

— James Hall