Ancient Persian kitchens were known for their elaborate designs, and some of them incorporated built-in indoor herb drying racks. These kitchens were equipped with clay pots, copper utensils, and other cooking tools. The drying racks were typically made of wood or metal, and they were placed in warm and airy areas of the kitchen. The Persians used herbs extensively in their cuisine for flavoring and medicinal purposes, and drying them allowed for year-round availability and enhanced taste in their dishes.