 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