St George's Square is the central square of Valletta - an ideal Renaissance city. In the center of the city is his heart - the center of the highest power, i.e. the palace of the Grand Master of the Knights of St. John preserved to this day. In front of him, on the opposite side of the square, there is Guardia della Piazza - a guardhouse erected at the beginning of the 17th century, in which the personal protection of the Grand Master was stationed.
The construction of Valletta began a year after the great siege of Malta by the Turks in 1565. The Joannites had the ambition that the newly built city would become the realization of the unsurpassed model of an ideal Renaissance city - a castle on a rectangular plan (preferably a square), surrounded by a wall, with a grid of geometrically ordered streets, intersecting at right angles at regular intervals. This geometric arrangement has been preserved in Valletta to this day.
The idea of what an ideal city should look like was taken from the Apocalypse of Saint. John. The Prophet describes Jerusalem as a city that had "a huge and high wall, had twelve gates," "was quadrangular, and its length was the same as its width."