buildings croatia Dubrovnik houses roof rooftop tiles town ceiling clouds glass sky windows architecture blue house modern tiled window chimney chimneys roofs abstract angles appearance architectural colored colors coloured colours covered covering dark edges edging elements exterior external height high light lines patterned patterns perspectives protection protective roof-area roof-tiles roofing rough rows shade shadows shapes smooth sunlight sunshine surface surfaced surfaces terracotta textured textures tiling variations wavy copper ridge spire tile top tower dirty slum slums smog smoke soundproof soundproofing square squares texture