After the first World War Miskolc became more important, because Hungary had to give Kassa, the other important city of the area, to Slovakia. Miskolc became a centre of iron industry. In 1945 Miskolc and Diósgyőr became one city. In 1949 a university was founded in Miskolc. Lots of people moved to Miskolc because they could find new jobs in the city. In the 1980s more than 200.000 people lived here. It was the second largest city in Hungary (the first was the capital Budapest). Now Miskolc is the third largest, the second is Debrecen.