Haydn biography in pictures
http://www.aeiou.at/hy-bild.htm

Haydn portrait
http://www.carolinaclassical.com/articles/haydn.html
http://www.classicalarchives.com/haydn.html

Haydn portrait gallery, with autograph manuscript and drawings of Esterhazy palace
http://www.karadar.com/PhotoGallery/haydn.html

Haydn picture gallery with works list
http://w3.rz-berlin.mpg.de/cmp/haydnj.html

Haydn's Music

Sonate pour piano en sol majeur, Hob XVI : 6 / L. 13
http://patachonf.free.fr/musique/haydn/msxvi6.htm#bas

Historical Keyed trumpet of the type used for the Haydn Trumpet Concerto
http://abel.hive.no/trumpet/articles/keyed_trumpet/