The businessman in Heinrich Maria Davringhausen’s Der Schieber (The Profiteer), 1920-1921 sits several floors above the city streets, pencil in hand; the high-rise buildings pressing at the windows around him. Not in Germany. In France.

In later life Gustav Metzger appeared a marginal, eccentric figure. The diminutive, white-bearded artist, was often to be seen round London’s galleries in the early to mid-2010s, dropping off piles of hand-produced fliers urging his fellow artists to “remember nature”.

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.

There’s a sharp observation, delivered in Alan Bennett’s soft tones, that sums up the reputation of the painter Eric Ravilious: “Because his paintings are so accessible, I don’t think he’s thought to be a great artist. It’s because of his charm. He’s so easy to like and things have to be hard, if they’re not hard, then they’re not great."

The story is riveting. A nanny living in New York and Chicago spent her spare time wandering the streets taking photographs. She learned to develop and print, but her plan to publish the images as postcards fell through and, as time passed, she stopped bothering even to develop the negatives let alone print them.

Part two of The Milk of Dreams, the central International Exhibition at the 2022 Venice Biennale, housed in the Arsenale shipyard, starts with the kind of massive, grandstanding gesture that’s necessary in a venue of this scale: a colossal bronze bust of a Black woman by American artist Simone Leigh. The serene head with its eyes smoothed into blank sightlessness extends up into the ancient rafters, while the upper body is reduced to a ribbed dome-like form reminiscent of traditional African architecture.

Air is a weighty subject, and in both senses; if we did not contain its gases in our bodies, the air would crush us. Ninety-nine per cent of the world’s population breathe polluted air daily. There was a time on this planet, 3.5 billion years ago, before oxygen. Startling facts like these are perhaps to be expected from an exhibition at the scientific Wellcome Collection.

If you need an excuse to spend a day in the charming seaside town of Whitstable, the Biennale is it. After a four-year hiatus, the festival is back with a somewhat edgy, apocalyptic feel.

Cecelia Alemani's vision for The Milk of Dreams, the International Exhibition at the Venice Biennale 2022 had me excited – and perplexed – from the moment I heard about it.

Cornelia Parker’s early installations are as fresh and as thought provoking as when they were made. Her Tate Britain retrospective opens with Thirty Pieces of Silver (pictured below left: Detail). It’s more than 30 years since she ran over a collection of silver plate with a steamroller, then suspended the flattened objects on strings so they hang in silver pools a few inches above the floor.