References page: Image "The book of Ser Marco Polo: the Venetian concerning the kingdoms and marvels of the East by Polo, Marco, 1254-1323 - Cordier, Henri, 1849-1925; Yule, Amy Frances; Yule, Henry, Sir, 1820-1889" - Source book page on INTERNET ARCHIVE
Media page: Photo "Shanghai", CC0 Public Domain on PIXABAY
Contacts page: Photo "Castel del Monte" shot by Niccolò Rigacci, CC BY-SA 3.0 - on Wikimedia Commons