The history of Bulgaria can be traced from the first settlements on the lands of modern Bulgaria to its formation as a nation-state and includes the history of the Bulgarian people and their origin. The earliest evidence of hominid occupation discovered on what is today Bulgaria date from at least 1.4 million years ago. Around 5000 BC, a sophisticated civilization already existed and produced some of the first pottery and jewelry in the world. After 3000 BC, the Thracians appeared on the Balkan peninsula. In the late 6th century BC, most of what is nowadays Bulgaria came under the Persian Empire. In the 470s BC, the Thracians formed the powerful Odrysian Kingdom, probably just after the Persian defeat in Greece in 480-479 AD, and lasted until 46 BC, when was finally conquered by the Roman Empire. During the centuries, some Thracian tribes fell under Ancient Macedonian and Hellenistic, and also Celtic domination. This mixture of ancient peoples was assimilated by the Slavs, who permanently settled on the peninsula after 500 AD.