Knowledge of pepper truly flowered during the European period of exploration that began in the late fifteenth century. Pepper grows in hot, humid conditions near sea level, so many of the areas where pepper grows were simply unknown to Europeans until seafaring, exploring, and empire-building began. In addition, European tastes favored the "sweet pot," in which both sweet and savory ingredients were cooked in a single pot on the hearth. The spices used most often for this kind of cooking were nutmeg, cinnamon, mace, ginger, and cloves.