The Servian Wall is an ancient defensive structure that surrounded the city of Rome. Built in the 4th century BC, it was named after the sixth king of Rome, Servius Tullius. The wall was constructed primarily from large blocks of tuff and served to protect the city from invasions and attacks. Originally, the Servian Wall stretched about 11 kilometers and included several gates, such as the Porta Capena and Porta Collina. Over time, parts of the wall were dismantled or incorporated into later structures, but some sections still remain visible today, offering insight into ancient Roman engineering and urban planning.