The Union Jack

It is commonly known as the Union Jack, although the exact origin of the name is unclear.The Union Flag underwent a gradual development.When Charles II was restored to the throne in 1660 he reintroduced the Union Flag of James I.The emblems that appear on the Union Flag are the crosses of the three patron Saints.History of the Union Flag.In the seventeenth century the flag underwent several changes.The cross remains on the flag although only Northern Ireland now remains part of the United Kingdom.