From its size and the quality of the work, this tile can be shown to be from the Imamzadah Yahya at Veramin which is datable to 1262 AD and was executed by the Kashani craftsman 'Ali ibn Muhammad. The group is discussed and other examples are illustrated in Watson, O.: Persian Lustre Ware, London 1985, in particular col. pl.K and pp. 131-132. Ten further examples are in the Godman Collection, now in the British Museum, published in Godman, F.du C.: The Godman Collection of Oriental and Spanish Pottery and Glass, 1865-1900, London 1901, p.23, no.150 and pl.XVII, no.407.