Complex sentence: It received a town charter in 1417, becoming a major town for the minority of Carpathian Germans and a center of mining (gold, silver, nickel, later iron, cobalt, copper, mercury etc.) and iron processing in the past.
Split into simpler sentences: It received a town charter in 1417, becoming a major town for the minority of Carpathian Germans. The town was a center of mining (gold, silver, nickel, later iron, cobalt, copper, mercury etc.) and iron processing in the past.