Philip Ferrari de La Renotière, Herzog von Gallièra in Genua, was a legendary stamp collector, assembling probably the most complete worldwide collection that ever existed, or is likely to exist. Among his extremely rare stamps were the unique Tre Skilling Yellow of Sweden and the 1856 one-cent "Black on Magenta" of British Guiana. Wikipedia
The definitive Wikipedia entry for Philipp von Ferrary. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Philipp_von_Ferrary
