"New techniques in firing coloured mosaic tiles allowed the Shah's architects to revel in wondrous displays of decoration, brought to perfection here in the Shah Mosque (1612-38). Designed by the master calligrapher and miniaturist Rezza Abbasi, the blue, yellow, turquoise, pink and green tiles catch and reflect the light of this bright and hot city, animating cool spaces under the great blue dome of Abbas's mosque." 

BBC