Girl with a Pearl Earring, painted by Vermeer in 1665, might just be the most famous and beloved portrait in the world.
But who is the girl?
Well, that's the thing. There was no girl, because this isn't a portrait...
Johannes Vermeer (1632-1675) is one of the greatest painters who ever lived, though in his lifetime he wasn't known beyond his hometown.
He was born in Delft during the Dutch Golden Age, a period of extraordinary cultural, political, and economic flourishing in the Netherlands.
Vermeer, like many of his contemporaries - and unlike artists in Catholic parts of Europe - generally stuck to so-called "genre paintings."
This means a scene from everyday life rather than a religious topic, which had been the dominant theme of art in Europe for centuries:
Hence the proliferation of wonderful Dutch landscape artists during the Golden Age, like Jacob van Ruisdael, who painted the real world unadorned and without the idealising, classical spirit of the Italian Renaissance and its successor movements.
Ordinary beauty.
There had been many extraordinary genre painters, such as Jan van Eyck with his Arnolfini Wedding or Brueghel the Elder and his countryside jollies.
It was the farmer, the maid, and the merchant - rather than figures of Classical and Biblical history - that they depicted:
In this way Vermeer represents the continuation of a rich tradition of genre paintings in Northern Europe, and one which perhaps reached its height during his lifetime.
What made Vermeer special was his mastery of colour and light, his delicacy and his mystery.
Vermeer worked slowly and with quality materials.
He used pigments such as ultramarine (extremely expensive), vermillion, lead-tin yellow, and umber - playing these rich colours off against or over one another - to great effect, combining vivid figures with plain backgrounds:
And, beyond his careful balancing & mixing of colours, Vermeer always held back from introducing too many details.
Once his style had matured, Vermeer kept his interiors simple.
The united effect gives his domestic scenes an air of great refinment and harmony:
Just consider another typical domestic genre painting from the same era.
This is a wonderfully comic scene painted by Jan Steen in 1663 - but it's all action and movement, and even well-composed, the frame is flooded with detail.
Now look at something like this, Lady Writing a Letter with her Maid.
Vermeer's scenes are gentle & uncomical; they *look* quiet.
And there's almost something mysterious about Vermeer, slightly ethereal, in his simple, careful balances of light and colour.
Even his landscapes (of which there are but two) convey the same tranquillity.
This view of his hometown, Delft, is a vision of peace and refined simplicity.
Perhaps Vermeer's greatest painting is the Milkmaid, from 1658, a simple composition with exquisite colours.
It might just be the culmination of "genre painting" - at least, the uncomical type - serenity embodied, a moment captured, a domestic idealism in art.
And that brings us to Girl with a Pearl Earring, which *isn't* a portrait.
How? Well... what is a portrait?
A portrait is a painting of a named individual; a representation of them in art. Before photography, portraits were how people had their likenesses captured.
So what is the Girl with a Pearl Earring, if not a portrait?
It's a "tronie".
This was a popular art form in 17th century Dutch and Flemish painting in which painters portrayed not a specified person, but a *type* of person (often as a so-called "head"):
And beyond types of people they could also be allegories for a particular emotion or human quality.
The tronie could be of youth or old age, of melancholy or greed. And unlike grand neoclassical allegories with all their symbolism, the tronie was straightforward:
They often featured strained or unusual expressions - experiments in human expressiveness, perhaps - and can therefore be amusing, as when depicting surprise or the pain of pulling off a plaster:
Or rather more contemplative, even frightening, as in the many tronies of old age. Dignified musations on mortality, or bitter parodies of the elderly?
So that's why tronies aren't named after people - like portraits - but given generic names based on the figure depicted or idea portrayed: old woman, old man, youth with violin, surprise, contemplation... or girl with a pearl earring.
What we see are ideas represented by faces.
Hence the title - not because we don't know her name, but because it's a tronie.
Because she never had a name, because she might not have even been real, because Vermeer wasn't trying to depict a living person, but a *feeling* in human form.
Indeed, Girl with a Pearl Earring has only been its title for a few decades.
After Vermeer's death it was catalogued as "tronie in antique costume" and after its reappearance in the 1880s was called "Girl with a Turban" in Dutch, or "Head of a Young Girl" in the Anglosphere.
Seen as a tronie - an expressive allegory - Girl with a Pearl Earring perhaps makes more sense.
Not a portrait of a specific person but the embodiment of an idea, even the simple feeling of a fleeting glance - or whatever else it is the viewer sees in this allegorical face.
Or in the famous pearl, one of the outstanding examples of Vermeer's love for and attention to light.
A few delicate brushstrokes, a glinting highlight set off against the shadows... and Vermeer captures the imaginations of so many; his colourful genius at its very best.
Girl with a Pearl Earring (or whatever we call it) represents the culmination of the tronie - and more.
Vermeer brought his supreme sensibility for colour and composition to bear on this painting, and so - as with all truly great art - it has surpassed its original context.
Not many paintings have been definitively attributed to Vermeer - he worked slowly and died at just 43 after a moderately successful career had ended in financial troubles.
Upon which Vermeer fell into obscurity for a long time, for neither he nor his art ever left Delft.
And here is Johannes Vermeer himself, in a possible self-portrait; over three centuries later, his paintings have travelled the world.
A master of delicacy, of light and colour, whose frozen moments of simple and harmonious time have enthralled and delighted millions...
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It features seven short lessons every Friday, including art, architecture, history, and rhetoric.
This is Grauman's Egyptian Theatre in Hollywood, built in the 1920s.
Why so grand? Because Hollywood was making 800 films per year and 75% of the American population went to the movies weekly.
What were they watching? Well, 1920s cinema was much stranger than you realise...
Movies had been around since the late 1880s, first as short reels and then as increasingly impressive feature films in the 1910s.
Like Cabiria, an Italian film from 1914, which is sometimes called the first historical epic, with thousands of extras and colossal sets.
But Europe was devastated by WWI and film production essentially ceased.
That gave America a chance to catch up.
By the close of the 1920s about 800 films were being produced every year in Hollywood and weekly cinema attendance was 90 million — American movies were on top.
Four young painters at the French Academy of Fine Arts — Claude Monet, Pierre-Auguste Renoir, Alfred Sisley, and Frédéric Bazille — realise they have something in common.
See, Academic painting took place in studios, with models, much like this:
To these four artists the Academic way seemed artificial, what with its carefully orchestrated lighting.
They also thought it was lifeless, given how it imitated the Renaissance.
And they believed art could be about more than the usual themes of Biblical or Classical history.
This is Borgund Church in Norway, made entirely out of wood and built over 800 years ago.
It is a "stave church", an incredibly unusual type of Medieval building.
What makes them so special? Well, there are only 30 original stave churches in the world...
Norway officially adopted Christianity in the 11th century.
And they started building churches, entirely of wood, often on sites once used for pagan worship.
This boom in church construction continued for three hundred years and culminated in wonders like Heddal Stave Church.
More than 1,000 stave churches were built in Norway alone, with others in Denmark, Sweden, and Britain.
Though some stone churches were built, it was simply the practice in Medieval Norway to make them with wood, seemingly more so than anywhere else in northern Europe.
It sounds like a boring topic, but air conditioning is more important than you realise.
First: there are 2 billion air con units in the world and they account for 10% of all electricity we use.
Second: it has revolutionised architecture and totally reshaped global politics...
In 1901 a New York publishing company had a problem: inconsistent humidity in their factory made it difficult to print in colour.
An engineer called Willis Carrier solved this problem for them by inventing a machine which regulated both humidity and temperature.
Carrier realised the broader potential of his invention and founded a company to mass-produce these climate control machines for domestic and commercial use.
So begins the first part of this story — how air conditioning changed the way our world both looks and works.
The history of skyscrapers can be divided into five ages.
First is historical buildings which were tall — though not necessarily what we think of when we hear the word "skyscraper".
Like the Leaning Tower of Pisa, a belltower, completed in 1372 after two centuries' work:
These ancient or Medieval towers were inevitably made from solid stone and wooden timbers — without the aid of modern materials like reinforced concrete.
Among the tallest pre-modern structures was Rouen Cathedral, whose 19th century spire reaches 151 metres tall.