Celtic Shield
This is an OpenScad version of a bronze shield dating back to the Late Bronze Age circa 700 BC.
Today it can be viewed in the National Museum of Ireland in Dublin
http://www.shee-eire.com/Arts&Crafts/Celtic/Metalwork/Shields/Bronze-Shields/Page1.htm

The handle is not authentic. It should be curved, but with the same attachment points

The size and design of the shield can be varied by changing the values for the constants at the beginning of the SCAD code, and the accuracy of the details by changing the $f numbers