Coins minted in the Year 1820

What happended in 1820?
The Monarch is George III (until 29 January) and on his death his son, the Prince Regent, becomes George IV. Prime Minister is Robert Jenkinson, 2nd Earl of Liverpool (Tory). A General Election increases Tory party majority. James Monroe is President of the USA. HMS Beagle is launched, the ship that will take Charles Darwin on his scientific voyage.