Guiseppe Penone’s lyrical and tactile works, made from the simple elemental materials that typify the 1960s Italian Arte Povera movement (of which he is a key exponent), belong largely to the outside world of woods and gardens. But they also find an ideal setting in the serene light-filled spaces of Marian Goodman Gallery, where Penone’s perennial fascination with the relationship between man, nature and art is fruitfully explored in an exhibition entitled Fui, Sarò, Non Sono (I was, I will be, I am not).

Neon was once the triumphant glowing symbol of commerce and capitalism. In the 1930s the distinctive tube lighting gleamed above broadway theatres and on prominent billboards in the world’s great metropolises from New York to Paris. These glory days were not to last. Within just few years neon signs were removed from their downtown pride of place, demoted instead to apologetically jutting out from roadside motels and peripheral dive bars.

“Outside the day may be blue and gold, but the light that creeps down through the thickly-muffled glass of the small iron-barred window beneath which one sits is grey and niggard. It is always twilight in one’s cell, as it is always midnight in one’s heart.” Oscar Wilde’s description of his incarceration in cell C.3.3 at Reading Gaol hits home when you stand inside the mean little room (now number C.2.2) imagining what it was like to spend 23 hours a day locked in this claustrophobic box. 

It has been 350 years since the Great Fire of London. A festival of art and ideas by Artichoke, the company behind Lumiere London, has brought a series of free, inventive installations and performances to the capital. These curated events and live art happenings don't so much teach us about the events of the past, but enable us to take stock of what's happening right now in the world, and challenge us to change for the future.

Australia and Japan were first to host Björk Digital, but it lands at London’s Somerset House with fresh, never-before-seen work. The immersive virtual reality exhibition collates several digital- and film-based works born from Björk's critically acclaimed album Vulnicura. Arguably her most revealing release to date, Vulnicura – in all its forms – documents the destruction of her marriage, with devastatingly unguarded lyrics.

It is sobering to think that the medieval and Renaissance paintings that fill our galleries represent just a fraction of the artistic output of that period. Panel paintings – not to mention exquisitely fragile wall paintings – have for the most part succumbed to the ravages of time, and those not destroyed by fire or flood, acts of war or vandalism, or abortive attempts at restoration have simply faded, darkened or discoloured.

A gorgeous white horse with flowing mane, poised and alert in a rocky landscape next to a watchful lion, is an extraordinary study of suppressed tension.

American photographer William Eggleston is famous for dedicating himself to colour photography at a time when it was still considered kitsch – acceptable for wedding and Christening photos, but not much else. The best known example of his embrace of colour is a 1973 photo of a red light bulb hanging from a red ceiling, a picture devoid of subject matter beyond redness and the associations it triggers.

Winifred Knights (1899-1947) was an impeccable draughtsman: her portrait drawings are compelling. She deployed fine webs of lines, her sure hand applying gradated pressure resulting in mesmerising studies of people that are hypnotically fascinating. Who knew pencil could do so much? But she was also a painter, a slow worker using techniques that were deliberately old-fashioned.

A neon sign over the Barbican’s Silk Street entrance reads Scandinavian Pain. Following its victory over us in Euro 16, it seems that Iceland is now drenching us with its special brand of melancholy. Things are not that simple, of course. In his work, Icelandic artist Ragnar Kjartansson indulges his penchant for sorrow with such bitter sweetness that, with many a gentle sigh, emotional pain morphs into something more akin to pleasure.