Answer:
It helped develope American culture.
Explanation:
He successfully repelled an invasion by rival claimant Herald Hardrada of norway
Answer:
Active in trade with others
Explanation: got it right on a test
Byzantium/Constantinople was conquered in 1451, but the empire continued to decline starting around the 18th or 19th centuries. It officially died in WWI. As for how long it was a major threat to Europe, the empire's prime was the 16th century, under Suleiman the Magnificent.
