church colours flooring germany gleam light Magdeburg medieval middle ages parquetry stained-glass stone sun background board floor ground parquet pattern plank planking texture textures timber timbered wood wooden batten grain plywood vein arranged arrangement bamboo bamboo-strips brown color colored colour coloured decoration decorative details flat geometric-patterns glued inlaid-work laminated laminations plain pressed shape shaped smooth strips surface surfaced surfaces textured illustrated illustration angles angular block-patterns blocks coloring colors colouring contrast contrasting floorboards flooring-pattern geometric geometric-mosaic geometrical glue herringbone long-lasting low-maintenance mosaic parquet-floor patterned patterns surfacing tiles tiling timbers wood-pieces woodgrain