ocr: debated. During those five centuries, continuous progress was made in archi- tectural design. Among scholars of Minoan Crete, a division is often made between the First (or Old) Palace Period (1930 to 1700 B.C.) and the Second (or New) Palace Period (1700 to 1450 B.C.); a major episode of destruction, probably caused by an earthquake, divided the two epochs. The architectural history of the palaces is actually much more complex than such a division suggests. Each palace was probably built and rebuilt many times. In all this develop- ment no trace exists of foreign invaders; what is observed is ...