Which city is known as the 'Eternal City'?

Rome is referred to as the 'Eternal City' due to its long and storied history that spans over two thousand years, serving as a central hub for art, culture, and politics throughout various historical epochs. The term reflects the idea that the city holds a timeless quality, symbolizing the enduring legacy of its ancient civilization and its continuous influence on modern society. This designation captures not only the historical significance of Rome but also its architectural wonders and cultural depth, making it a place of pilgrimage for those interested in antiquity and history. The rich heritage of Rome, including landmarks such as the Colosseum, the Roman Forum, and the Vatican, further solidifies its reputation as the Eternal City.

The other options represent significant cities in their own right, but they lack the specific historical connotations and cultural identity associated with the term 'Eternal City' as it uniquely applies to Rome.