Students will get a few minutes to examine Martellus' map and compare and contrast it to Ptolemy's influencial work. Students can see how the new information from the Portuguese expedition, brought new information to the shape of Africa and other regions in the world. Also, making connections and similarities to Ptolemys map. They can observe how, if this was the map that Christopher Columbus used and studied. We can understand how he thought if he traveled west over the Atlantic, he would create a passage to Asia.