The Saint Andrew’s Cross is a national flag of Scotland. It features a white saltire (a diagonal cross) on a blue field. The cross is named after Saint Andrew, the patron saint of Scotland, who was crucified on a diagonal cross. The flag has been used since the 15th century, and today it is flown alongside the Union Jack, the national flag of the United Kingdom, which represents the political union of Scotland with England, Wales, and Northern Ireland. The Saint Andrew’s Cross is also incorporated into the flags of several other countries and territories, including the state flag of Alabama in the United States.