Allāhwirdī Khān is the name of the famous bridge over the Zāyandah Rūd river in Iṣfahān by means of which the northern and southern parts of the famous Chahār Bāgh boulevard are connected (see Fig. 18). The bridge spans 295 m and is 13.5 m wide, underpinned by thirty-three supporting arches or piers, making it the largest operational bridge of historical note in Iran (Guzārish, 11; cf. Pope, 3/1236). It has also been referred to as the ‘Shāh ʿAbbāsī’, ‘Chahār Bāgh’, ‘Sī wa Sih Chishmah’ and…