The Popular Version of the Arms
These are the Arms and Motto as recognised and accepted by the people of Gibraltar.
The Arms themselves are as granted to the Rock by Fernando and Ysabel of Spain on July 10th 1502. Click here for more information.
The Latin Motto (added later) simply means "These are the symbols of Mount Calpe (i.e. of Gibraltar)".
Gibraltar was known as Mons Calpe (Mount Calpe) in Greek and Roman times.