tile seamless pattern in celtic style

background backgrounds celtic pattern style texture tile tileable vector abstract symmetrical ancient antique arabesque architecture border knot knotwork circle classical cultures decor decorating decoration decorative design element dividing geometric shape gothic loopable elements medieval oldfashioned ornament ornate pagan retro sacral scandinavian culture seamless sign square stencil symbol symmetry template architectural line drawing font art sketch monochrome cartoon brand wing diagram iron white