Painted during his first trip to Paris in 1900, Picasso’s Le Moulin de la Galette is an outsider’s view of an exotic and intimidating new world. Men and women are seen as if through some strange distorting lens, their blurred, mask-like faces indistinct but for red-slit mouths and coal-black eyes. We seem to be in the room with them, and yet we are isolated. Even a woman looking out from the edge of the canvas gazes straight past us: if not invisible, we are certainly inconsequential.

An exceptionally wide-ranging exhibition of paintings, sculptures, drawings and lithographs by Alberto Giacometti (1901-1966) commemorates the 50th anniversary of his death. Amidst the flurry of Giacometti exhibitions – the National Portrait Gallery’s Pure Presence last autumn and a huge exhibition at Tate Modern to come next spring – this anthology is unmissable for the different contexts it offers.

Here be two modestly scaled masterpieces from the 1760s by George Stubbs, highlights of a centuries-old tradition of painting the horses owned by the Dukes of Newcastle and their lateral descendants the Dukes of Portland (the Devonshires are also connected in a grand web of aristocratic marriages). Stubbs was commissioned by the third Duke of Portland (1738-1809), William Cavendish-Bentinck, indisputably one of the grandest in the land: a politician and a multi-billionaire in today’s terms.

A good half of the portraits in Russia and the Arts are of figures without whom any conception of 19th century European culture would be incomplete. A felicitous subtitle, “The Age of Tolstoy and Tchaikovsky”, provides a natural, even easy point of orientation for those approaching Russian culture, and with it the country’s history and character, without particular advance knowledge.

The individual colleges of the University of Cambridge can call, when needed, on an astonishing international network of alumni for expert advice, consultation and financial support. Such is the backing for an exquisite new public gallery on the site of Edwardian stables in the grounds of Downing College there.

“Finding the Light”, the second episode of this four-part series, took us to the period when Scottish intellectuals led the world in innovative and revolutionary thinking, Edinburgh’s neo-classical architecture in the leafy streets of the New Town made for new standards of civic architecture, and Scottish education could be of the highest quality.

In 1994 the art magazine Modern Painters invited fresh blood onto its editorial board. The new intake included a novelist, William Boyd, and a rock star, David Bowie. "That’s how I got to know him," says Boyd. "We’d sit at the table with all these art critics and art experts feeling like new boys slightly having to prove ourselves. He interviewed Balthus, he interviewed Tracey Emin. He wrote for the magazine effectively."

Art collectors are rarely what one might expect. Everyone has their particular enthusiasms, quirks and foibles, which make their collections unique and reflective of their tastes. In my career as a curator I have learnt never to have preconceptions when visiting collectors. The best pictures can often be found in the most modest of homes. Nothing can beat the buzz of encountering an iconic artwork in the most unlikely of settings. It is a lesson in how important it is not to make judgements about individuals before meeting them properly.

The New Yorker Peggy Guggenheim (1898-1979) was the classic poor little rich girl: insecure, a woman with scores, perhaps hundreds of lovers, longing for love, the writer of tell-all memoirs. What sets her apart is that she was also the creator of one of the world’s greatest collections of modern and contemporary western art. 

Things you might know about Oslo: it’s expensive and the cost of a beer, wine, dinner for two – whatever your tourist yardstick – might make your hair stand on end (the cost of living is currently second only to Singapore city, according to a 2014 survey by the Economist Intelligence Unit); it’s small (population: 600,000), yet it’s also the fastest growing capital in Europe, thanks to both overseas immigration and the fact that many Norwegians are now moving to the capital; its most celebrated son is, of course, Edvard Munch.