The Imam Mosque, the largest building attributed to Shah Abbas the Great. Work began on the magnificent entrance portal in 1611, and it took four years to finish. 30m tall, it has mosaics featuring geometric designs, floral motifs and calligraphy by the greatest artists of the age. The Mosque faces towards Mecca, however the entrance portal is oriented to face the square. The Sheikh Lotfollah Mosque, originally built for the Shah’s harem. Its pale dome makes use of delicate cream-coloured tiles that change colour throughout the day from cream to pink. Its portal boasts some of the best surviving Safavid era mosaics in the country. The Ali Qapu Palace, built at the end of the 16th century as a residence for Shah Abbas I. Its elevated terrace affords a wonderful perspective of the Square and one of the best views of the Imam Mosque. Chehel Sotun, built as a pleasure pavilion and reception hall. Today it’s most famous for its frescoes. Although the Afghans whitewashed them during an 18th century invasion, the frescoes fortunately survived. Khaju bridge over the Zayande river. The Khaju Bridge is arguably the finest in the city. Its 110m length has two levels of terraced arcades, the lower containing locks to regulate the water flow. The remains of some of the original painting and tiles can still be seen, as well as stone seats built for the Shah to sit on to admire the view. Sio She Pol Bridge is 298m long, with 33 arches that give it its name. It links the upper and lower halves of the Chahar Bagh, the tree-lined main street that runs through the centre of Esfahan Cathedral of the Holy Saviour (the Vank Cathedral), between 1606 and 1655. Its richly decorated interior is the focal point of the Armenian Church in Iran.