Roman sculpture had the purpose of portraying Roman heroes and reflecting Roman history. It was influenced by Etruscan and Greek sculpture, focusing on realistic depictions and details. The main genres were portraits and historical reliefs. Portraits evolved from only depicting heads to showing more of the body and individual characteristics over time, and were used both for commemorating ancestors and glorifying emperors. Historical reliefs adorned structures like altars, triumphal arches, and columns, aiming to glorify events and immortalize Roman accomplishments through realistic and narrative scenes.