In a fourth meaning, "France" refers only to the "Pays de France", one of the many "pays" (Latin: "pagi", singular "pagus") of Île-de-France. French provinces are traditionally made up of several "pays", which are the direct continuation of the "pagi" set up by the Roman administration during Antiquity. The province of Île-de-France is thus made up of several "pays": "Pays de France", Parisis, Hurepoix, French Vexin, and so on. "Pays de France" is the extremely fertile plain located immediately north of Paris which supported one of the most productive agriculture during the Middle Ages and was responsible for the tremendous wealth of the kingdom of France before the Hundred Years' War, making possible the emergence of the Gothic art and architecture which spread all over western Europe. "Pays de France" is also called "Plaine de France" (i.e. "Plain of France"). Its historic main town is Saint-Denis, where the first gothic cathedral in the world was built in the 12th century, and inside which the kings of France are buried. "Pays de France" is now almost entirely built up, being but the northern extension of the Paris suburbs.