The Scottish flag, also known as the Saltire, features a white diagonal cross on a blue background. This design represents the cross of Saint Andrew, the patron saint of Scotland, who was crucified on a diagonal cross. The flag's colors symbolize the sky and the clouds of Scotland. The Saltire is one of the oldest flags in the world, with its origins dating back to the 9th century. It is an important national symbol and is often displayed during national holidays, sporting events, and celebrations of Scottish culture.