Search for: [Subject and Keywords = Europe] OR [Subject and Keywords = firearms] OR [Subject and Keywords = defensive architecture] OR [Subject and Keywords = castle] OR [Subject and Keywords = fortress] OR [Subject and Keywords = loop hole] OR [Title = From Tower to the Bastion. Changes in Fortress Design to Accommodate Gunpowder Artillery \(14th to 16th Centuries\)] OR [Creator = Krauskopf, Christof] OR [Creator = Purton, Peter]