The Union Jack flag of Great Britain represents the patron saints of England, Scotland, and Ireland. The red cross of St. George of England is superimposed on the white cross of St. Patrick of Ireland, which is superimposed on the blue saltire of St. Andrew of Scotland. Wales is not included as it was part of the Kingdom of England when the flag was designed. The flag dates back to 1801 with the union of Ireland and Great Britain under one kingdom.