Why did the Victorians build things like that? Were they just confused? Or did they have the right idea?
The Victorians built everything: churches and train stations, theatres and public baths, banks and bridges, courts and town halls, museums and castles.
But there was no single Victorian style - they mixed together what had come before and transformed it into something new.
The best place to begin is with their most famous style: Victorian Neo-Gothic.
After centuries of slumber the architecture of the Middle Ages was revived by the Victorians, who filled their town halls with pointed arches, clustered columns, ribbed vaults, and stained glass.
Les Demoiselles d'Avignon, painted by Pablo Picasso in 1907, is probably the most influential work of modern art.
But he didn't come up with it all himself.
Picasso borrowed from the art of West Africa, ancient Iberian sculpture, an obscure Medieval architect, and El Greco...
In the first years of the 20th century Pablo Picasso's art looked like this, far from the cubes, the abstraction, the vivid colours, and the strangeness of his most famous paintings.
So what changed?
In 1907 Picasso, then aged 26, visited the Musée d'Ethnographie du Trocadéro in Paris.
It was filled with art and other objects taken there by the French Empire, among them some ceremonial masks of the Fang from West Africa.
Bluetooth is named after a one thousand year old Danish king with rotten teeth, and its logo is based on the Viking runes for his initials.
But that's all an accident - it was originally supposed to be called Personal Area Networking...
The wireless technology we now call Bluetooth was invented in the 1990s.
During its emergence three major companies - Intel, Ericsson, and Nokia - met to discuss cross-product standardisation, so that mobile devices and PCs could both connect with it.
That was in 1996.
A placeholder name was needed during the development of this standardised technology, and an engineer from Intel called Jim Kardach suggested Bluetooth as a temporary name.
Everybody agreed it would work until, at some point in the future, a better name could be found.
Have you ever noticed that the save icon is a floppy disk, even though they became obsolete twenty years ago?
That's called a "skeuomorph" - when something new takes on the appearance of what it replaced.
And once you start to look, they're everywhere...
Another example is phone cameras. Even though they don't have mechanical shutters, they make a clicking sound like physical cameras do.
And the phone icon itself looks like an old corded telephone:
Or the various logos for email providers, like that of Gmail, which imitates the appearance of an envelope despite there being no paper or postage involved: