 Complete the following phrase:  From the 15th to the beginning of the 18th centuries, the territory of the modern Kukmorsky district was part of the Arskaya Daruga of the Kazan Khanate and later was transferred into the eponymous county uyezd. The village of Zavod Kukmor was established in the 17th century next to a copper ore deposit and metal mining was organized later by Russian artisans. In the 18th century, the demand for copper ore increased significantly and the merchant Absalyamov opened a copper plant in the village. During the 