Flag of the United Kingdom
The first Union Flag from 1603 combined the flag of Scotland with the flag of England. The flag of Scotland is a Saint Andrew's Cross because Saint Andrew is the patron saint of Scotland. The flag of England is Saint George's Cross because Saint George is the patron saint of England. When the present United Kingdom started in 1801, the Saint Patrick's Cross started to be a part of the Union Flag. Saint Patrick's Cross was a flag representative of Ireland because Saint Patrick is the patron saint of Ireland. Saint Patrick's Cross is a red saltire (a diagonal cross) with a white background. The flag of Scotland is blue with a white saltire. The flag of England is white with a red horizontal cross. Together they make the Union Flag.