Four reasons the cobalt still holds

Tin-and-cobalt majolica isn’t paint on brick — the fired oxide layer is what survives six centuries of sun.

Fine ivory tendrils outline each colour, so turquoise never bleeds into lapis — the lattice reads clean at any distance.

Each iwan portal funnels the eye upward into the calligraphic band — geometry serving the inscription, not competing with it.

Tilla-Kari gilding never fills the ground — it traces the Thuluth script, so the eye follows the words across the blue.