The empire known for its conquests across three continents is the Roman Empire. Spanning Europe, North Africa, and parts of Asia, the Roman Empire was established around 27 BCE and lasted until the fall of the Western Empire in 476 CE. Through military conquests, it integrated diverse cultures, languages, and religions while establishing a complex system of governance. This vast empire contributed significantly to architecture, law, and language, with its influence still evident in modern Western society. The Roman Empire's legacy includes enduring principles of governance and societal organization.