The exterior of the Imam Mosque - known as the Shah Mosque before the 1979 Islamic Revolution - features master calligraphy and tile-work. Here, it is covered in ornamental red bulbs to honor the birthday of the Hidden Imam, a Messianic leader believed by some Shia to be living in secrecy among the people.

The exterior of the Imam Mosque – known as the Shah Mosque before the 1979 Islamic Revolution – features master calligraphy and tile-work. Here, it is covered in ornamental red bulbs to honor the birthday of the Hidden Imam, a Messianic leader believed by some Shia to be living in secrecy among the people.