http://www.frederickcollection.org/collection.html A great collection of restored instruments used for concert programs. And the Fredericks are very nice people...

http://fractales.inria.fr/~louchet/perso/pleyel.html French piano page dedicated mainly to Pleyel.

www.erard.nl Fritz Janmaat's Erard site

http://schweighofer.tripod.com/ Calin's Schweighofer site