Today marks 750 years since the first English Parliament at Westminster, London.
Ayshah's been finding out how the UK is run as part of the BBC's Democracy Day.
In a democracy, people get to elect their leaders and have more say in how their country is run.
That's something a lot of people around the world are still fighting for.
Ayshah went to the Houses of Parliament in London to find out how laws are made in the UK.