They may be two of the best-known names in early 20th century modern art, but Piet Mondrian and Hilma af Klint never actually met. Decades after their deaths in 1944, they are enjoying a posthumous ...

Roses and irises appear alongside leaves, shells, spirals, overlapping and concentric circles, curlicues and looping letter forms. It’s like gazing through a microscope and discovering a world of ...