Centro Vasco de Arquitectura
Euskal Herriko Arkitektura Ikerkundea
http://www.wikipaintings.org/en/andrea-del-verrocchio/mode/all-paintings
http://www.nysun.com/pics/7526.jpg
http://www.newarkhistory.com/colleonigattamelata.jpg
http://www.paradoxplace.com/Insights/Equestrian/Equestrian_Images/Verrocchio-Colleoni-B.jpg
http://www.paradoxplace.com/Insights/Equestrian/Equestrian_Images/Verrocchio-Colleoni2-Oct07-DSC_0199AR.jpg