ancient arch architecture brick Copenhagen danish Denmark elements historical Kobenhavn old tower wall window castle fortress germany Harz medieval middle ages pattern Regenstein stone strong stronghold texture building church decorative historic house old town ornament palace pillars Vilnius windows block flat flats high horizon lines sandstone sky-scraper skyscraper storey alcazaba fort fortified Moorish Málaga palm protect secure Spain spanish bricks circle clock count decoration dial digits hour measure round sun sundial time watch angles appearances architectural architectural elements battlement carnels corbels crenellation crenels decorative-battlements defensive-architecture defensive-wall extended-outwards fortification masonry-structure merlons ornamental ornamentation parapet ramparts segment supported supporting-corbels supports wall-segment wall-tower orange build construction guard history kaunas railing reconstruction roof walls christian Derbyshire England english Great Britain religion religious rural village arches dam Elan Valley hold landmark landscape reservoir retain wales water welsh