Naqsh-e Jahan Square (also known as Imam Square) is the overwhelmingly impressive central attraction of Esfahan, which features a number of architectural wonders. At the southern edge of the square, which stretches over half a kilometre in length, is the Imam Mosque (or Shah Mosque). Completed in 1629, the UNESCO world heritage site is arguably the premier example of Iran’s Islamic architecture. Intricate blue-tiled mosaics, splendid Quranic calligraphy, glittering iwans, towering yet delicate minarets, perfectly geometrical floral motifs – the dazzling aesthetic unity of this structural masterpiece is widely regarded as one of the most beautiful mosques in the world.