The first reported coal mine in Katowice ("Murcki" coal mine) was established in 1740, and in 1769 construction on "Emanuelssegen" mine started. As the demand for coal kept rising in the Kingdom of Prussia, further mines were opened: "Beata" (1801), "Ferdinand" (1823), "Kleofas" (1845). Later in 19th and early 20th century additional mines were opened: "Katowice", "Wujek", "Eminenz" (later renamed "Gottwald" and merged with "Kleofas"), "Wieczorek", "Boże Dary", "Staszic" and renewed "Murcki". Currently two remain in operation: "Wujek" (scheduled to close in 2021) and "Murcki-Staszic". Katowice is also the seat of Polska Grupa Górnicza, the largest coal mining corporation in Europe.