These city walls, built by the Ottoman sultan Suleiman the Magnificent in the 16th century, are only the latest fortifications to protect our mystery city. The city and its walls were destroyed in 587BCE during the Babylonian siege and much of the population was deported to Babylon. When the Persians took control of the region some 50 years later, the exiled citizens were allowed to return and the walls were rebuilt. The walls were extended in the 2nd century BCE by the Hasmonean dynasty and by Herod the Great and his son Agrippa in the following century or so. The city and its walls were destroyed again in 70CE, this time by the Romans, who occupied the city and renamed it Aelia Capitolina. The Roman walls built over the following four centuries were destroyed in an earthquake in the 11th century. The walls went up and down again several times more, with invasions and occupations by the Islamic Fatimid and Ayyubid dynasties and Christian crusaders. The existing walls have stood, more or less as they are today, for 400 years.

Can you name that city? 
See below for answers.

This mystery city is Jerusalem.
Click to see Jerusalem tours.