All aboard! 4000 visitors a day are queuing up for a voyage in the belly of a whale. Anish Kapoor’s Leviathan, a commission for the Monumenta series at the Paris Grand Palais, is a runaway success, one of those Zeitgeist-attuned mega-installations that double up as fairground attraction and religious experience.

Max Bill might be the missing link in modern art. He died only in 1994, yet he studied at the Bauhaus in Dessau in the 1920s, taught by Josef Albers, László Moholy-Nagy, Paul Klee and Kandinsky. It is hard to imagine that someone who was working at full strength less than 20 years ago could have a past that is so strongly entwined with these legendary names – hard to imagine, that is, until one looks at the work displayed in this fine retrospective, which even so manages to encompass only five decades of a nearly seven-decade-long career.

In this month of royal weddings, endless bank holidays and (possibly?) equally endless good weather, it can be hard to focus, so perhaps this is the perfect opportunity to catch up with a show that nearly got away. Instead of winsome blockbusters like Tate Modern’s Miró, or the V&A’s The Cult of Beauty, Ivor Abrahams' print show is tart as well as sweet, small but perfectly formed, the ideal restorative after too much sugar, whether in wedding cakes or art galleries.

A cult suggests unhealthy worship, and there’s more than a whiff of that in the heady decadence of the V&A’s latest art and design blockbuster, The Cult of Beauty. This is an exhibition which examines how the influence of a small clique of artists grew to inspire ideas not only about soft furnishings and the House Beautiful, but to influence a whole way of life, teaching the aspiring Victorian bohemian how, in the words of Oscar Wilde, “to live up to the beauty of one’s teapot”. And as one might expect, the exhibition is beautifully designed, in a way that suggests you might have stumbled into the secret, scented and darkly cavernous chambers of an aesthete Aladdin.

Austere, elegant, impressive. Edwin Lutyens’s Whitehall Cenotaph is a thing of beauty, a monument that embodies permanence in the face of all that is impermanent, and solidity in the face of all that is ephemeral. It’s an inspired decision to bring it indoors, for inside a hushed gallery, away from the rush of traffic and stripped of its flags and sculpted wreathes, Lutyens’s memorial can at last be properly admired as a work of art.

The first thing to make clear is that Robert Mapplethorpe, notorious for his photograph of himself with a bullwhip up his arse, is not really a photographer: he is a sculptor who works in the medium of photography. What else can explain the marble and ebony of his chiselled subjects, or the fact that most of the works selected for this show as responses to Mapplethorpe are sculptures?

Gabriel Orozco has been something of an art-world secret, for some mysterious reason. He has been fêted at the Venice Biennale, he showed at the prestigious Documenta in Kassel, had a blazing Serpentine show, an Artangel commission and been flavour of the month for more than a decade to those who follow contemporary art. But to the general public? Nada, nothing, zip. And God knows why, for, as this fine Tate retrospective shows, Gabriel Orozco is the real McCoy; a dazzling creator, a serious thinker, a joyous, liberating mind and a pair of eyes that helps us see new. On top of that, as an artist he has charm to burn. For heaven’s sake, what’s not to like?

Gabriel Orozco has been something of an art-world secret, for some mysterious reason. He has been fêted at the Venice Biennale, he showed at the prestigious Documenta in Kassel, had a blazing Serpentine show, an Artangel commission and been flavour of the month for more than a decade to those who follow contemporary art. But to the general public? Nada, nothing, zip. And God knows why, for, as this fine Tate retrospective shows, Gabriel Orozco is the real McCoy; a dazzling creator, a serious thinker, a joyous, liberating mind and a pair of eyes that helps us see new. On top of that, as an artist he has charm to burn. For heaven’s sake, what’s not to like?

Last year gave us three giants of Post-Impressionism. The Royal Academy promised to unveil the real Van Gogh by showing us the man of letters; Tate Modern delivered a sumptuous survey of Gauguin; and a significantly smaller but nonetheless intelligent and illuminating display at the Courtauld Gallery homed in on just one series of paintings in Cézanne’s oeuvre - the ambitious, masterly and compositionally complex The Card Players.

There is probably only one thing that Ann Widdecombe and I have ever agreed upon: we both think it might be a really good idea to stick William Wilberforce on the Fourth Plinth. Why not? It’s nice to have contemporary art in Trafalgar Square, of course, but surely there are few other reforming characters as worthy as the great abolitionist? And Wilberforce was many other things besides – though not all of them would necessarily impress the nation to quite the same degree.