Bornholm the migrants did not remain. Bornholm also attracted many famous artists at the beginning of the 20th century, forming a group now known as the Bornholm school of painters. In addition to Oluf Høst, they include Karl Isaksson (1878–1922), from Sweden, and the Danes Edvard Weie (1879–1943), Olaf Rude (1886–1957), Niels Lergaard (1893–1982), and Kræsten Iversen (1886–1955). Bornholm, as a part of Denmark, was captured by Germany on 10 April 1940, and served as a lookout post and listening station during the war, as it was a part of the Eastern Front. The island's perfect central position in the Baltic
Bornholm damage caused by the war. The island is home to 15 medieval churches, four of which are round churches with unique artwork and architecture. The ancient site of Rispebjerg has remains of sun temples from the Neolithic and earthworks from the Iron Age. There are 14 European bison near Åkirkeby, attracting 100,000 visitors a year. Because of the dilapidated state of their buildings, all secondary educational facilities in Rønne, including adult evening classes, are being transferred to new facilities at Campus Bornholm in 2018. Campus Bornholm is a merger formed in June 2010 consisting of Bornholms Erhvervsskole (youth and adults),