one week with the Anna octavos and the Anna parish fair, one of the biggest folk festivals of Germany. 17th to 19th century In 1642, Düren was embroiled in the Thirty Years' War. Opposing troops destroyed the city. After the war has finally ended in 1648, plague broke out and caused many lives to be lost. A second plague epidemic broke out in 1665. Due to the various attacks on the debilitated city, Düren was destroyed again in 1679. In this time, the settlement Miesheim was destroyed, never to be rebuilt. Towards the end of the year 1755 in the area around Düren and Aachen began a series of earthquakes, which reached its peak on February 18, 1756 with an earthquake with the strength 8 on the Mercalli scale. The series of earthquakes affected all of Europe, most famously the 1755 Lisbon earthquake. The businesses in the area of Düren was affected since the 15th century by the drapery and metal industry. Since the beginning of the 17th century, paper industry had settled here, advantaged by the exceptionally soft water of the Rur. Rütger von Scheven built the first paper mill in Düren. In 1812, there were already 17 paper factories, 11 cloth- and blanket factories, an iron rolling mill or slitting mill and two iron foundries. In the year 1794, Düren was occupied by French revolutionary troops. From 1798 until 1814, Düren was the main city of the same named canton in the arrondissement Aachen of the French Roerdepartements (from the name of the River Rur (Roer) and départment). After the Congress of Vienna in 1815, Düren was ceded to the Kingdom of Prussia and was subsequently administered within the Rhine Province. 20th century By 1900, Düren was among Germany's richest cities (with 42 millionaires and 93 factories) and had a population of 27,168. By comparison, fewer than 5,000 people had lived in Düren a century earlier. The city of Düren was located on the main fighting front during the Allied invasion of Germany in World War II. During 1944 and 1945, the protracted and bloody Battle for Hürtgenwald was fought on Düren's district area, and on November 16, 1944, Düren was completely destroyed by Allied air bombings. Approximately 22,000 people lived in Düren at that time, and 3,000 of them died during the bombing. Those who survived were evacuated to central Germany. Destroyed buildings included the Stadttheater Düren