With their curious juxtapositions and scrambling of pictorial space a dream-like atmosphere is conjured in Mamma Andersson’s paintings. Her scenes are often confined to the domestic or everyday realm, but, even when peopled, suggest something closer to still life than real life. Or perhaps stilled-life. The Swedish painter (Mamma is a nickname), now in her 50s, received welcome exposure in the UK with her Camden Arts Centre retrospective in 2007. This latest exhibition is, I believe, amongst her strongest work yet.

Down by the seaside, an array of rather lumpen large naked women are marching, posing, reclining, and even rolling over along the walls of the new Jerwood Gallery, delineated by William Scott (1913-1989). Scott’s centenary is being commemorated with an array of exhibitions and publications in Britain and America, and the market too is revving up with the publication of a four-volume catalogue of his oil paintings.

Ellen Gallagher is obsessed by the issue of black cultural identity; but if that sounds tedious or tendentious, think again. She explores her theme in work that is so varied, so beautiful and so humorous that the furrow she ploughs seems more like an endless opportunity than a narrow limitation.

Saloua Raouda Choucair began her career as a painter, initially studying under Lebanon’s two leading landscape artists, Mustafa Farroukh and Omar Onsi. In the late 1940s, she trained in the studio of Fernande Léger while studying at the Ecole des Beaux-Arts in Paris. Her exposure to art in her native Beirut would have given no hint of the vibrant modernism she would embrace, albeit several decades after Europe had been all aflush with the new.

When I visited Rachel Whiteread two years ago, there were two old sheds gathering dust in her basement as though waiting to be loved and put to use. Why was she cluttering up her studio with such large and intrusive objects, I wondered? “Things fester,” she told me by way of explanation. “I like to mull things over, so they might lie about for years. It’s to do with me noticing them; they need to relate to my train of thought and investigation.

“I don’t like the family Stein; There is Gert, there is Ep and there’s Ein; Gert’s Poems are bunk, Ep’s statues are punk, And nobody understands Ein” (Anon).

Jacob Epstein (1880-1959) did indeed sculpt Albert Einstein when the physicist was briefly interned in London on his way to America in 1933; Epstein’s bust of the quizzical shock haired scientist is currently on view at the Victoria and Albert. Epstein described his subject, already legendary, as humane, humorous and profound and was particularly struck by his hair going every which way.  

There was a time when the art of the Low Countries was considered to be very lowly and base indeed. It was the high art of Italy that counted if you were a person of culture and breeding. Not for you the carousing common folk of Jan Steen, or those watery flatlands of Van Goyen, touched with too much bleak realism. It was the arcadian Campagna of Claude – like Poussin a Frenchman but with the Rubicon flowing through his veins – that you looked to.

Ambika P3 is a windowless, cavernous basement once used to test concrete for huge building projects – the Channel Tunnel among them – now ingeniously recycled as a kunsthalle gallery / performance space.  Thus it is strikingly appropriate for its current incarnation.

It’s an instinct of curators to put the pieces back together, to reintroduce works of art which time and market forces have scattered to the four winds. In recent memory, exhibitions have reunited in one space all of Monet’s haystacks, Cézanne’s card players and, in the case of the National Gallery’s momentous Leonardo show, both versions of The Virgin on the Rocks. A new exhibition opened this week in Florence which takes the business of synthesis to the next level.

"In the midst of life we are in death.” This is a line we may feel compelled to reverse as we encounter the first exhibits in the British Museum’s extraordinarily powerful exhibition, for this is a display vividly bringing the dead to life in the very midst of their extraordinary demise. But then, “ashes to ashes” conveys particular resonance, too, for we all know that Pompeii, a town situated in the Bay of Naples, and its lesser known, less populous neighbour Herculaneum, were both covered in a thick layer of ash when Mount Vesuvius erupted in AD79.