Moreover, the definition of the species and that of the genus are applicable to the primary substance, and that of the genus to the species. View in context Moreover, the goods and merchandise for the Indian trade ought to have brought three times the amount for which they were sold.
The answer most often given is about 500 years, or from 31BCE - 476CE. The ending of the Roman Empire is just an arbitrary date, usually the year of the first sacking of Rome by barbarians. However, Roman emperors still continued to rule for many years after this. In addition, the Eastern Roman Empire continued for almost another thousand years. The Roman Empire.
The Ottoman Empire lasted 700 years. Holy Roman Empire, with all It's ebbs and Flows, (Mostly Flows) Lasted from 10th century to 18th century for almost 800 years. Eastern Roman Empire, (Byzantium) lasted for 1100 years though it was a Vassal and pale shadow of it's glory by the last part. And Ethiopian empire, the only African Nation to escape Western Dominance in Africa from 12th century to 20th century. 800 years till 20th century!