abstract architectural backdrop background barrier brick brick-wall bricks brickwork cement colored coloring colors coloured colouring colours constructed exterior external firm linear lines mortar perspective perspectives secure security smooth solid standard strength strong style surface surfaced surfaces texture textured textures traditional-brick-wall variation varied various wall walled wallpaper well-built architecture bedrock formation heritage historic Historic site kiln kilns landscape light lime-kilns park patched patchwork repairs rock rock-work rocks rubble ruins shadows stairs steps stone stone-steps stone-wall stone-work stones structure sunlight surfacing trees variations vegetation walls arch brick-walls historic-site archway Asian buddhism calm concentration contemplation deep thought desktop garden heart-searching introspection japanese Karesansui garden meditation oriental pondering quiet time raked gravel reflection relax rumination self-examination soothe stepping stones stone arrangements structures symbolic water take a break take time out tranquil tranquilize water zen