European coat of plates and coifs from a mass grave, battle of Visby, fought in July 1361 on the Swedish Baltic island of Gotland, between invading Danish troops and the local, Gutnish, forces. The Danish won a decisive victory. Due to the heat, the dead had to be disposed of quickly, and many were buried in their armour. The archaeological excavation of one of the mass graves, in the 1930s, revealed over 1000 skeletons.