The Imam Mosque, on the south side of Naqsh-e Jahan Square, is a supreme masterpiece of Persian Islamic architecture, its soaring dome and portal clad in dazzling blue tilework and its interior renowned for perfect acoustics. A ticketed UNESCO-listed monument from the Safavid golden age, its scale, colour and craftsmanship make it one of the most beautiful mosques in the world and an essential Isfahan sight.