Answer:
He discovered the tomb of King Tutankhamun of Egypt.
Explanation:
Howard Carter was a British archaeologist and worked in Egypt a lot. He becomes famous due to his discovery. He discovered the intact tomb of King Tutankhamun. King Tutankhamun was the Pharaoh of the 18th Dynasty of Egypt.
This discovery was important because the tomb was important as it was evidence and record what is the Egyptian Pharaoh's tomb looked like. It also tells what was ancient look like and other ancient information.
