With over 100 years of coal fired brick-oven pizza-making traditions, Grimaldi's continues to ensure that future generations are able to experience a distinctive and truly authentic pizza. Why coal-fired brick ovens? The tantalizing aroma of pizza and calzones baked to perfection in Grimaldi's signature coal burning oven offers a unique flavor and a crisp crust that is just not possible from gas, convection or wood burning ovens.