Most of Greece is mountainous, and very ill-suited for farming, but the Greek life-style was still centered on Agriculture. They made good use of their land. Where arable land was available, the Greeks grew grains, mostly corn. In the hills, they could grow grapes and olives, and in the mountains where only flowers and short-grasses can grow they herded sheep and goats. Cattle were very rare, and used only for their milk and cheese. The Greeks were also great fishermen, as most of their cities and colonies were founded near water. Most of their meat supply came from fish. What the Greeks could not grow / raise themselves they imported, and Greece was the center for trade in the old world for several centuries B.C.E.