Picture XVI Solution: http://www.jerrybarton.eu/Architecture/DoYouKnowVienna/28990687_zwRPWb#!i=2481180236&k=Ht5LF8n
Picture XVII Solution: http://www.jerrybarton.eu/Architecture/DoYouKnowVienna/28990687_zwRPWb#!i=2481180159&k=GDX4vGZ
Picture XVIII Solution: http://www.jerrybarton.eu/Architecture/DoYouKnowVienna/28990687_zwRPWb#!i=2481110101&k=RzrCb3b
