From the AP "Today in History" column for April 12—

On this date:

In 1606, England's King James I decreed the design of the original Union Flag, which combined the flags of England and Scotland.

http://www.log24.com/log/pix11/110412-UnionFlag1606.jpg

The 1606 Union Flag incorporated the crosses of St. George (England) and St. Andrew (Scotland).
This suggests some notes on graphic design.

See The Double Cross.