Spanish food has been shaped by many influences: among them Roman, Arabic, Jewish, and the products brought back by the Conquistadores from the New World. There are many common threads within the cooking of Spain, from salt cod to saffron, and on the whole, Spanish home cooking throughout the Peninsula is simple, uncomplicated, and direct, with a singular lack of adornment on the plate. This could be austere, were it not for the strong, true flavors of prime ingredients rooted in the local terra (terroir) that need no disguise or affectation. Yet, for both historical and geographical reasons, the sense of regional identity and separatism remains strong in the many provinces (kingdoms) of Spain, and this is also proudly reflected in the cooking. The North-West of Spain, for example, probably has more in common with other Celtic countries than it does with Moorish Andalusia. Centuries of isolation from the rest of Europe has also safeguarded many wonderful