From her fourth floor flat, which is also her studio, the painter Celia Paul looks out over the British Museum, the figures of the Muses carved into its pediment huge and present compared to the antlike, and usually teeming, human life below (main picture: British Museum and Plane Tree Branches).

The note of longing scored into this exhibition’s title is well-judged: as things are now, it is the sight of the elderly in the company of friends, watching the world go by from a doorstep or park bench, that provokes a pang of nostalgia, far more than the surface details of the mid-20^th century, when these pictures were taken.

The former home of 19^th century architect Sir John Soane has long been celebrated as one of London’s hidden marvels, an astonishing treasure trove of architectural models, paintings, sculptures and historical artefacts concealed behind an elegant but unassuming facade.

Salvador Dalí’s house at Portlligat on the Costa Brava is straight out of the pages of a lifestyle magazine, its sunbaked white walls dazzling in the sunshine, and light pouring in from every angle. It was a fisherman’s hut when Dalí moved there in 1930, extending it over 40 years like “a true biological structure” to make a home and a place to work for himself and his wife Gala, with every window letting in a view of the sea.

The limitations of life on screen are all too apparent at the moment, and yet still there are instances where online can offer something beyond the reach of an old-fashioned trip to an art gallery. Ultra-high resolution reproductions of works of art are a case in point, and many museum websites now allow us to examine their collections in the microscopic detail once reserved for conservation departments.

Museums and galleries have found innovative and varied ways to keep their collections within reach, and to bring us the many temporary exhibitions forced to close by the virus. But even the most dedicated gallery-goer may by now be tiring of online talks and tours, which so often make unreasonable demands on both guide and viewer and increasingly feel like a very poor substitute for the real thing.

When New York artist Adam Parker-Smith said “I feel like so many of my ideas start out as jokes, for better or worse”, he may not have anticipated featuring in an exhibition that looks like the mother of all art-world pranks.

Anyone lucky enough to have a garden will be newly appreciative of the oasis that even the humblest of outdoor spaces can provide. Based on the Royal Academy’s hugely successful 2016 exhibition of the same name, and broadcast on Monday evening by Exhibition on Screen via Facebook, Painting the Modern Garden opened the door to a different world.

Newly conserved and restored, the eight exterior panels of Jan Van Eyck’s Ghent Altarpiece, 1432, are the focus of an exhibition at the Museum of Fine Arts in Ghent, cut short by Covid-19, but now available to view via an online tour.

One year on the world is drastically altered, but footage of Notre Dame’s stricken spire collapsing in flames is no less shocking. That this event, endlessly replayed, has not paled against the new reality of daily death tolls is testament to the scale of the loss. As the rector of Notre Dame, Patrick Chauvet put it: “Notre Dame is not just Paris, it’s France and beyond France, it’s the world.”