The National Flag of Malta is defined in the Constitution and consists of two equal vertical stripes, white in the hoist and red in the fly, with a representation of the George Cross, edged with red, in the canton of the white stripe; the breadth of the flag is one and a half times its height.
The current emblem of Malta is described by the Emblem and Public Seal of Malta Act (1975) as a shield showing an heraldic representation of the National Flag; above the shield a mural crown in gold with a sally port and eight turrets (five only being visible) representing the fortifications of Malta and denoting a City State; and around the shield a wreath of two branches: the dexter of Olive, the sinister of Palm, symbols of peace and courage to victory traditionally associated with Malta, all in their proper colours, tied at base with a white ribbon, backed red and upon which are written the words Repubblika ta' Malta in capital letters in black. (source)
The Maltese cross, also known as the Amalfi cross, is identified as the symbol of an order of Christian warriors known as the Knights Hospitaller or Knights of Malta and through them came to be identified with the Mediterranean island of Malta and is one of the National symbols of Malta. (source)
Thank you Marta!