Spices were among the most luxurious products available in the Middle Ages, the most common being black pepper, cinnamon (and the cheaper alternative cassia), cumin, nutmeg, ginger and cloves. They all had to be imported from plantations in Asia and Africa, which made them extremely expensive, and gave them social cachet such that pepper for example was hoarded, traded and conspicuously donated in the manner of gold bullion. It has been estimated that around 1,000 tons of pepper and 1,000 tons of the other common spices were imported into Western Europe each year during the late Middle Ages. The value of these goods was the equivalent of a yearly supply of grain for 1.5 million people. While pepper was the most common spice, the most exclusive (though not the most obscure in its origin) was saffron, used as much for its vivid yellow-red color as for its flavor, for according to the humours, yellow signified hot and dry, valued qualities; turmeric provided a yellow substitute, and touches of gilding at banquets supplied both the medieval love of ostentatious show and Galenic dietary lore: at the sumptuous banquet that Cardinal Riario offered the daughter of the King of Naples in June 1473, the bread was gilded. Among the spices that have now fallen into obscurity are grains of paradise, a relative of cardamom which almost entirely replaced pepper in late medieval north French cooking, long pepper, mace, spikenard, galangal and cubeb. Sugar, unlike today, was considered to be a type of spice due to its high cost and humoral qualities. Few dishes employed just one type of spice or herb, but rather a combination of several different ones. Even when a dish was dominated by a single flavor it was usually combined with another to produce a compound taste, for example parsley and cloves or pepper and ginger.