staircase inside the julius tower in the spandau citadel. berlin, germany

stair room spiral interior detail design staircase ancient antique architecture bastion berlin building capital citadel denmark europe exterior fort fortress germany historic historical history house landmark landmarks landscape medieval military museum old renaissance roof round tourist tower travel view vintage wall window abstract background climb color curve european flight light lighthouse lindau railings shadows shape germany inside julius spandau citadel spandau#39aph39#s meters high german: zitadelle