Gümüşhane or Gyumushkhana is a city and the capital district of Gümüşhane Province in the Black Sea region of Turkey. The city lies along the Harşit River, at an elevation of 5,000 feet (1,500 m), about 40 miles (65 km) southwest of Trabzon. According to the 2010 census, population of Gümüşhane urban center is 28,620. The district covers an area of 1789km2, and the town lies at an elevation of 1227m. Coordinates on world : 40°27′35″N 39°28′40″EHistoryIt is suggested that the ancient Thia was located 4 miles west of modern Gümüşhane, in modern Beşkilise. In Byzantine period, there was a town named Tzanicha or Tzantzakon, possibly located 2 miles to the west of Gümüşhane.Around 840 AD, the area was included in the new Roman province of Chaldia . It was later ruled by the Byzantine Empire of Trebizond.During Ottoman years, the sanjak of Gümüşhane fell under the administration successively Rum Province, Erzurum Province and Trabzon Province, and was divided into four kazas: Gümüşhane, Torul, Şiran, and Kelkit .The sanjak in which Gümüşhane was situated at some stage comprised 37 mines of argentiferous lead and six copper mines. There is no evidence that these mines were in use during Byzantine times.