Piccadilly Circus, London c.1900.
Why is it called Piccadilly Circus?
In 1612 a man named Robert Baker built a mansion house just to the
north of what is now Piccadilly Circus. He made his wealth from the sale
of Picadils, stiff collars worn by the fashionable gents in court.
Locals derisively called his mansion Picadil Hall, and so the name
Piccadilly stuck. The word ‘Circus’ referred to the roundabout around
which the traffic used to circulate.
Source: London fun tours.