In 1870, Rome became the capital city of the new Kingdom of Italy. During this time, neoclassicism, a building style influenced by the architecture of antiquity, became the predominant influence in Roman architecture. During this period, many great palaces in neoclassical styles were built to host ministries, embassies, and other government agencies. One of the best-known symbols of Roman neoclassicism is the Monument to Vittorio Emanuele II or "Altar of the Fatherland", where the Grave of the Unknown Soldier, who represents the 650,000 Italian soldiers who died in World War I, is located.