Under Henry's leadership important developments were made in cartography and navigation, laying the foundation for commerce by sea and the increase in Europe's wealth and power over the following centuries.
Editors. "Portuguese Prince Henry the Navigator establishes an observatory and a school of navigation". The Literary Encyclopedia. First published 01 March 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=9646, accessed 31 January 2015.]