Philip Ferrari de La Renotière, Herzog von
Gallièra in Genua,
(January 11, 1850 - May 20, 1917) was a legendary stamp collector,
assembling
probably the most complete worldwide collection that ever existed, or is
likely
to exist. Amongst his extremely rare stamps were the unique Tre Skilling
Yellow of Sweden and the 1856 one-cent "Black on Magenta" of British
Guiana,
considered to be the Rarest Stamp in the World.
