abstract angles appearance backdrop background building city column concrete design designed external gray grey historic layered layers levels pattern patterned strength strong structure style support support column surface texture textured textures wall arch carved church decorative pier pillar Scroll stone tower white bridge current flow metal ripple river stream water appearances architectural architectural elements architecture base circular columns fluted columns fluted pillars granite Greco-Roman modern pillars plinth shaft Australia bricked bricks brickwork colonnade cover covered dark darkened height high history light open-sided perspective perspectives posts secure shade shaded shadows shelter stonework structures sunlight sunshine view views arched arches beams pathway pavement paving pedestrian people roof roofing security shadow walking walkway