Puritans were often depicted as fools until they had a shot at government, and then the humour got darker.
The polarisation of today's political discourse has echoes of the intolerance that characterised the Puritan era and the French Revolution.
Impeachment was a common political tool in early modern England, but its use lapsed 20 years after it was adopted in the US constitution.
When the founders wrote the Constitution, they had to devise a punishment fitting for a civil servant's impeachment. One possible punishment: banishment from the community.
John Major was right – it didn't end well for the 17th-century king, who ignored parliament and lost his head.
Charles I's belief that art was a way of projecting power bankrupted England and alienated his people. The rest is history.
He strapped on a sword aged 43 – and changed British history.
Royal PR in pictures started with the Stuarts 400 years ago.