The Alte Thiele and Flache Thiele mineworkings were located south of Galgenhöhe hill (‘Gallows Hill’), Buchholz’s place of execution. Mining in this area initially focused on placer tin. This is evident from the tin placer heaps in Buchholz’s urban forests. By the 16th century, tin ore veins were also being mined. The mines were named after their primary shareholders, the Thiele family. Tin ore mining, which had been intermittent throughout this period, ceased in 1801.