National Geographic : 1945 Feb
This Round Church Is No Longer a Perfect Cylinder Buttresses and entrance hall have been added since Osterlars was built in the Middle Ages. Stern Lutherans whitewashed primitive frescoes on the in terior. The murals were scrubbed clean and restored in the last century. At Church and FortMedieval Danes Prayed and Fought Ols Kirke, near Allinge, is one ofBornholm's four round churches. Within their thick walls, stuffed withprovisions and arms, islanders took refuge when pirates ravaged the coast (page 244).