6. In the second millennium B.C.E. a prosperous civilization flourished in Crete, an island in the Aegean Sea. They traded, they designed and built unfortified palaces, had indoor plumbing, colorful frescoes, a centralized government and a writing system that had not yet been deciphered. Eventually, it was wiped out by the Mycenean Greeks around 1450 B.C.E. What is the name of this civilization?