On this day 544 years ago one of the most famous people in history was born.
Though you don't know her name, you definitely know her face.
Here is the story of the woman with the world's most famous smile, Lisa Gherardini, who never even saw her own portrait...
Lisa Gherardini was born in the Republic of Florence on 15th June, 1479.
She came from an old and aristocratic Florentine family which, though well off, wasn't quite as wealthy or influential as it used to be.
The Gherardinis made money from farms they owned around the city.
She was the eldest of seven children, and the family moved around Florence several times, eventually settling near the famous Santa Croce (seen here before its 19th century restoration).
Here the family may have befriended Piero da Vinci, the father of Leonardo.
A classic font, designed in 1982 by Robin Nicholas and Patricia Saunders, and once the default for things like PowerPoint and Excel.
But Arial has a secret: it's a knock-off with exactly the same letter width as another font in this list...
Arnold Böcklin
Designed by Otto Weisert in 1904 and named after the painter (most famous for the Isle of the Dead), this might be the most evocative typeface ever created.
It oozes Art Nouveau, though it *isn't* the same font used by Hector Guimard in his Paris Metro signs.
On this day 2,346 years ago Alexander the Great died in Babylon after a night of heavy drinking.
But what made him so great? And why was he mentioned in both the Bible and the Quran?
This is the story of the man who conquered the world before he was 30 years old...
Alexander was born in 356 BC in a city called Pella, the capital of Macedonia, to the north of Greece.
As a boy he was tutored by the famous Greek philosopher Aristotle, and imbued with a burning ambition by his mother, Olympias.
Later legends would say he was the son of Zeus.
Alexander's father, Philip II, has been overshadowed by his son.
For when Philip came to power in 359 BC Macedonia was in a terrible state, threatened by Thrace and Illyria and by the Greek cities, and on the brink of collapse.