The Greek and Portuguese students decided to work on façades of buildings  which exhibit geometric patterns and are found in their cities. They identified these patterns, reproduced them by hand and using computer software and then compared them in their classes. The Greek and Portuguese students had the chance to learn from each other the use of Geogebra (used by the Greeks)and Coreldraw (used by the Portuguese) and so they exchanged opinions, shared expertise and were exposed to different artistic approaches.