Tate Modern’s lofty Turbine Hall is dominated by a giant CinemaScope screen flipped on its side so it becomes 42ft high and resembles a lift shaft or cathedral window. Instead of angels, saints or sinners, though, the starring role in Tacita Dean’s FILM is given to the building’s east window – the one hidden behind the huge screen. One of the main subjects of the film, then, is the very spot where you are standing – where much of the film was shot.

In 1997 the Swiss artist Pipilotti Rist produced one of the most delightful videos ever made, and it won her the Biennale. Ever is Over All shows a young woman skipping down a city street gaily smashing car windows with a red-hot poker; and since it is shaped like a knobkerry, the flower makes a surprisingly convincing weapon. Oh dear, though, here comes a policewoman; but instead of admonishing or arresting the vandal, the bobby gives her an encouraging smile, salutes and walks on by. 

Art about art is one of my favourite kinds of art. Paintings, drawings, sculptures, films - works of art which talk about what art is, what the image is, what art can represent and what it can't - all appeal. It is not just a picture of some prostitutes and some African masks - it is Les demoiselles d'Avignon by Picasso and it blows apart the boundaries of painting by cramming three dimensions into two. And then there is Frank Stella, in a new survey of his career at Haunch of Venison, the ultimate modern artist-about-art - and I'm left cold.

A retrospective of an artist’s work is not usually a history of a working relationship, but in the case of Christo, this impressive exhibition of works from the past 40 years also marks two crucial partnerships: with his wife, Jeanne-Claude, who was his equal and co-creator from 1961, and with the Annely Juda gallery, which has mounted 12 exhibitions over four decades, as well as being intimately involved in their massive environmental “wrapped” pieces. Photographs of the end results are breathtaking, but even more gripping is watching the development of the processes over the years.

What are the most common responses to a work of contemporary art? I can think of two: “A six-year-old could have done that” (feel free to substitute “I” or “anyone”) and “But what does it actually mean?” Ryan Gander is an artist who is rather exercised by the latter. He is interested in the way we piece together scraps of evidence – overlooked details, context, history – in order to create meaning. We try to fill in the gaps. And when meaning eludes us we are often dismissive, even rather angry. Hence the protestation: “A six-year-old could have done that.” And indeed, that may well be true.

A few days visiting the Edinburgh Art Festival and the city itself becomes the encircling gallery. Under great canvases of lowering grey cloud, plunging up and down the different levels of the Old Town and the New, things unfold against the intense hues of emerald-green spaces, the coppery contrast of the beeches, the cold hardness of the towering walls of stone and the eddying flow of the crowds. Within this frame is the opportunity to see a wide diversity of exhibitions and events in almost 50 museums, non-profit, commercial and artist-run spaces, plus specially commissioned site-specific works.

For 35 years, contemporary art in Iraq was a no-no unless it was grimly, dully figurative or a gaudy mural glorifying Saddam Hussein. But this year, six Iraqi artists were invited to the most prestigious annual contemporary art event in the world; the Venice Biennale. It may be of little significance that Alan Yentob’s parents came from Iraq, but last night’s Imagine was probably the best of the series so far. Its focus may have been these artists and their art, but its reach was somehow much greater.

An article in this week's New Yorker bemoans the death of drawing in art. Why has the emphasis on craft, Adam Gopnik writes, been replaced by concept? He has evidently not seen the fantastic noirish drawings of Marcel van Eeden at Sprueth Magers in Mayfair.

It owns almost twice as many artworks as the Arts Council, and two-thirds of its 13,500-strong hoard is on display at any given time, yet it’s a collection the public never usually gets to see. Since its foundation in 1898, the Government Art Collection has been purchasing work by British artists not for the nation, but to hang exclusively in the corridors of power, from Downing Street to the British consulate’s office in Azerbaijan. Perhaps, in these cost-cutting times, it now feels impelled to justify its existence to the taxpayer by giving it a taster of its work – though, in all probability, the British taxpayer was probably unaware of its existence till now.

By anyone’s standards this is an obscure year for the Turner Prize shortlist: you should consider yourself a contemporary art aficionado if you’ve heard of even one of the artists. And if this is indeed the case, that artist is likely to be George Shaw; in recent years his work has featured regularly in group displays at Tate Britain.