The Roman Empire originated in Italy in the 8th century BC and went on to dominate much of Europe and parts of Asia and North Africa for over 500 years. Some key aspects of Roman culture included their advanced architecture like aqueducts, amphitheaters and baths built from materials like stone, brick and concrete. Their city planning involved a grid layout with public services centered around a forum. The Romans also had developments in civil engineering, transportation technology and medicine. Their society was stratified with patricians, plebeians and slaves having distinct roles and lifestyles. Roman culture was also influenced by Greek mythology and traditions and their art, literature and entertainment reflected this.