What is the Maltese cross?

The Maltese cross is a symbol that is most commonly associated with the Knights of Malta(also known as the Knights Hospitallers), who ruled the Maltese islands between 1530 and 1798. The Maltese cross is nowadays widely used and associated with Malta as a country, used by the national airline Air Malta as part of its livery, and even featuring on the Maltese Euro coins, for example.