Michael Craig-Martin was the most playful and provocative of the conceptual artists. His early sculptures are like visual puns, a play on the laws of nature. On the Table, 1970 (pictured below right), for instance, appears to defy gravity. Four buckets filled with water stand on a table; so far so ordinary. But the table has no legs and is suspended from the ceiling by ropes and pulleys.

Ukraine’s history is complex and often bitter. The territory has been endlessly fought over, divided, annexed and occupied. From 1917-20 it enjoyed a brief period of independence before being swallowed up once more by the Soviet Union after a vicious three year war – an example that Vladimir Putin is copying with his monstrous invasion.

In Titian’s painting Diana and Actaeon,1559, a cluster of naked beauties bathes beside a stream. Scarcely visible in the right hand corner is a black woman helping the goddess hide her nudity from Acteon who has stumbled into her private glade. The servant’s clothing and dark skin contrast with the pearly pink flesh of the nymphs – so much so that she almost merges with the tree trunk behind her, as though she were just part of the scenery.

One of the most cherished memories of my 40 plus years as an art critic is of easing my way between Marina Abramović and her partner Ulay. They were standing either side of a doorway at Documenta in Kassel, Germany, leaving just enough room for people to squeeze through, trying not to touch their naked bodies.

Whether you believe that Ellen Brammar’s play, Modest, newly arrived in London from Hull Truck Theatre, succeeds or not, rather depends on your criteria for evaluating theatre.

Treasures from the Hispanic Society Museum & Library are displayed as a monumental survey of Spanish art from Antiquity to the 20th century. The new exhibition stands as testament to the extraordinary vision of its founder, Archer M Huntington.

The Royal Academy’s Making Modernism is a welcome introduction to seven women painters working in Germany at the beginning of the last century. It wouldn’t surprise me if you’d never heard of Gabriele Münter, Marianne Werefkin and Paula Modersohn-Becker even though they enjoyed international reputations during their lives, since their male counterparts (Kandinsky, Klee, Jawlensky and Macke) are not well known here either.

South African artist William Kentridge appears on video in his studio, twice. On the right he sits scribbling, waiting for an idea to surface. Meanwhile his alter ego stands impatiently by, trying to peek at his other half’s notes and, desperate for enlightenment, even reads a recipe out loud. The artist, it seems, doesn’t have a clue; he is as much in the dark as everyone else. A Lesson in Lethargy, 2010 offers a brief moment of humour in this relentlessly dark exhibition.

I’ve always been bemused by the American painter, Milton Avery. Not having seen enough of his paintings together, I couldn’t gauge if they are quirkily naive – lodged in a cul de sac aside from the mainstream – or hyper-sophisticated harbingers of things to come.

David Hockney has a new toy, an app designed specially for him that allows him to work on an iPad with fine brushes. He spent the first five months of lockdown In Normandy making daily records of the coming of spring; the results are displayed in a large show at the Royal Academy (★★). Seamless animation turns his still images into a continuum.