Maria Schneider is one of the luminaries of contemporary jazz.

Maggie Smith rarely gives interviews. In the week that Downton Abbey's last-ever series episode is broadcast, and she reprises on screen her role in Alan Bennett's The Lady in the Van (pictured below with Alex Jennings), theartsdesk revisits an encounter that took place in Highclere Castle in 2010. It was the only interview Dame Maggie gave that summer apart from one – which took place just before – to Julian Fellowes.

Not many people write conspicuously brilliant tweets, but Elizabeth Watts is someone who does. Working on the most demanding aria on her stunning new CD of operatic numbers and cantatas by the lesser-known of the two Scarlattis, father Alessandro rather than son Domenico, she tweeted: “Good news – I can sing 88 notes without a breath. Bad news – Scarlatti wrote 89.”

He’s an American jazz giant; she’s a Scottish doyenne of the classical violin. Anyone familiar with one more than the other – and that’s more or less everyone – would do a double take to see their names on the same bill. But this week at Barbican Hall, a new concerto by Wynton Marsalis will be premiered by Nicola Benedetti and the London Symphony Orchestra.

How much would a Stradivarius or a Guarneri violin set you back? Hundreds of thousands of pounds? These days it’s more like millions – many millions. With the value of the finite collection of 17^th- and 18^th-century instruments only rising every year, and their appeal as investments increasing proportionally, it’s a rare musician indeed who can afford to play a historical violin of this quality.

It’s odd seeing the whole of Edward Gardner, as upright as a guardsman until a passionate passage unleashes a repertoire of fierce jabs, deft feints and rapid thrusts. For nine years Gardner's main post was on the podium in the pit of the London Coliseum where all you could see were his disembodied hands and, slowly silvering over the course of his tenure, his schoolboy haircut.

It’s not easy to see the pattern in Roger Michell’s career. More than most British directors, he has zigzagged between the stage and the screen. He was the one who first rehearsed such contemporary classics as Kevin Elyot’s My Night with Reg and Joe Penhall’s Blue/Orange towards their premieres, he has regularly staged the works of Pinter, and yet he is also the director of Notting Hill.

Bernard Cornwell's best-selling Sharpe series, set during the Napoleonic wars, transferred to television with huge success. This week, it’s the turn of his Saxon Stories to make the jump, as the BBC airs its lavish, eight-part drama The Last Kingdom, based on Cornwell's novels. Set against the backdrop of the Viking invasion of Britain and the birth of modern England, it follows the adventures of the impetuous, imperfect and complex hero Uhtred, born a Saxon, brought up a Dane.

“Whatever happened to Stephen Bishop?” is not a question likely to be asked by followers of legendary pianism. Born in San Pedro, Los Angeles on 17 October 1940, the young talent took his stepfather’s name as his career was launched at the age of 11. Later he honoured his own father’s Croatian "Kovacevich", by appending it to the “Bishop”. Now it’s plain Kovacevich carved in the pantheon of similar yet unique sensibilities like those of Arrau, Pollini, Richter and Zimerman, alongside masterly exponents of mostly different repertoire like Martha Argerich.

This year’s Olivier Awards saw the Young Vic trounce its South Bank neighbours, with Ivo van Hove’s revolutionary A View from the Bridge leading 11 nominations and four wins; the production opens on Broadway next week. It reflects an extraordinary period during which the theatre, originally an offshoot of the National, has grown to become one of Britain’s major creative powerhouses – all under the aegis of South African-born David Lan, artistic director since 2000.