There is a new website TRAVELOGUES, sponsored by the Aikaterini Laskaridis Foundation. "This website aims to make known the graphic materials found in travel accounts of journeys to Greece and the eastern Mediterranean from the 15th century onwards, and thus contribute both to students' education and scientific research. An important part of the editions that constituted the data base of the website belongs to the Historical Library of the Foundation."
This site is definitely worth taking a look.
Bibliography - http://eng.travelogues.gr/bibliography.php
Art and Antiquities
Social Sphere & Everyday Life
State & Military Institutions - Diplomatic Relations