As an art school the Bauhaus has a reputation for being the cradle of modernism, famous for establishing an alliance between art and industry which produced enduring design classics such as Marcel Breuer’s tubular steel chairs, Josef Albers’ silver and glass fruit bowl and Marianne Brandt’s elegant globe lamps. But that is only part of the story.

“I don’t want to be a Cyclops,” Pierre Boulez said in 2010, faced with the prospect of conducting a Chicago concert with only one working eye. Eye troubles, alas, have continued to bedevil the octogenarian giant of contemporary music, which is why his current engagements with the London Symphony Orchestra – there’s also a tour to Paris and Brussels this week, and a second Barbican engagement next Tuesday - have fallen into the hands of a younger composer-conductor of advanced habits, the admirable Hungarian Peter Eötvös.

How incredibly heartening that this latest edition of the BBC Symphony Orchestra's Total Immersion, focusing on the music of the contemporary Estonian composer, Arvo Pärt, sold out days in advance. Including an introduction to Pärt's music by the BBC Radio 3 presenter Sara Mohr-Pietsch, Dorian Supin's documentary film about the composer, 24 Preludes for a Fugue, a freestage event by the BBC SO Family Orchestra performing a new work inspired by Pärt's music, and three concerts, Saturday's day-long exploration provided an embarrassment of riches.

Gerald Barry's new operatic adaptation of Wilde's The Importance of Being Earnest delivers a number of firsts. The first opera score to contain an ostinato for smashed plates. The first orchestra to include a part for pistols and wellington boots. The first opera (that I know of) to offer the role of an aging mother to a male bass. And the first opera I've been to where I've cried with laughter.

Donatella Flick, one of Britain's most important arts patrons, is furious. "Madness!" she cries in her lush Italian voice. "This is a country that was fantastic, and now there's a demolition going on, bit by bit!" We're sitting in Sir Winston Churchill's old drawing room - now her drawing room - near Kensington Gardens, and I would give a lot to see David Cameron flinching on her huge black sofa as he got a withering dressing-down.

I don't have many feelings about the Titanic (any more than I do about any tragedies of the distant past). I know few of the facts, I can remember nothing of the film and I have been left almost completely untouched by the centenary. Yet I am enormously grateful to have caught a Barbican performance of The Sinking of the Titanic, Gavin Bryars' beautiful musical meditation on the event.  

It's one of the great perversities of modern cultural life that orchestras from America and Venezuela visit London more often than those from Birmingham or Manchester. A perversity and a shame, as last night's exceptional performance of Elgar's The Dream of Gerontius by the City of Birmingham Symphony Orchestra and CBSO Chorus on a rare visit to the Barbican showed.

It’s the star factor. Tickets for Big and Small, by the controversial German writer Botho Strauss, are selling fast because Cate Blanchett is in it. Her protean presence in this production by the Sydney Theatre Company, of which she is the co-artistic director, casts a glow over the whole event — she’s on stage for almost the entire running time of two and three-quarter hours. But there are other pleasures to savour here: chief of these is playwright Martin Crimp’s fresh, crisp and contemporary translation of the text.

You may be feeling Titanic fatigue by now, the last straw being the so-so Julian Fellowes TV romp which heads, as Adam Sweeting points out elsewhere, “an epidemic of TV programmes” this week.

Sufjan Stevens is a singer-songwriter of startling scope, one minute releasing a record dedicated to the state of Illinois, the next a five-disc Christmas box set or an album for the animals of the Chinese Zodiac. Bryce Dessner is the guitarist in indie rock act The National, but also plays semi-improvised avant-folk with Clogs and works with leading classical ensembles like Kronos Quartet and Bang On A Can.Composer Nico Muhly counts among his collaborators both symphony orchestras and the likes of Bjork, Bonnie "Prince" Billy and Antony and the Johnsons.