Isfahan (safavid dynasty, historical city, half of the world, UNESCO, world heritage site)

Isfahan has a population of approximately 1.6 million, making it the third largest city in Iran after Tehran and Mashhad, but was once one of the largest cities in the world. 

It is famous for its Perso–Islamic architecture, grand boulevards, covered bridges, palaces, tiled mosques, and minarets. Isfahan also has many historical buildings, monuments, paintings and artefacts. The fame of Isfahan led to the Persian pun and proverb "Esfahān nesf-e- jahān ast": Isfahan is half (of) the world.

The Naghsh-e Jahan Square in Isfahan is one of the largest city squares in the world. UNESCO has designated it a World Heritage Site