THREE COBALT BLUE UNDERGLAZE-PAINTED POTTERY BOWLS Kashan, Iran, 13th century  Of different sizes and shapes, the frit body decorated with cobalt blue lines developing from the centre and expanding towards the exterior, the larger bowl further decorated with a calligraphic band on black ground around the rim, on its base the inventory number. "No. 484", 7cm high and 13cm diam. the largest bowl.