There were thousands of these buildings made during the Safavid dynasty, about the 16th century CE in Iran. They were built to...
There were thousands of these buildings made during the Safavid dynasty, about the 16th century CE in Iran. They were built to collect the droppings as fertilizer for melon and cucumber fields. However, in modern times, chemically produced fertilizers have drastically reduced the viability of the bird guano industry, and as a result not many of these structures have survived to the present day.
