The Fra Mauro World Map (ca. 1460) is considered to be the crowning achievement of medieval cartographers. a. What is a possible reason for the south-up orientation of this map? b. What is the significance of the fact that this map DOES NOT have Jerusalem at its center? c. This map was made by a monk for the rulers of the Republics of Venice and Portugal. Why would rulers of these republics commission such a project?