Leonardo
http://www.universalleonardo.org/activities.php
http://dsc.discovery.com/tv/doing-davinci/doing-davinci.html
http://www.mos.org/sln/leonardo/LeonardosPerspective.htm
http://www.telegraph.co.uk/culture/culturepicturegalleries/7906435/Leonardo-da-Vinci-exhibition-at-the-National-Gallery-in-pictures.html képekben
http://www.npr.org/blogs/krulwich/2011/04/11/135300971/it-flies-davincis-dream-comes-true?ft=1&f=1130 videók
http://www.abc.net.au/news/video/2009/08/17/2657455.htm királyi oroszlán