100 Euros Yves Klein

Yves Klein died in 1962 at thirty-four, and this coin was issued fifty years after his death by the Monnaie de Paris as part of their ongoing series honoring French artists. Klein's most documented obsession was with a specific ultramarine pigment he developed and patented in 1960 — International Klein Blue, or IKB — and the Monnaie de Paris rendered the reverse in that precise color, one of the rare instances where a French commemorative coin required a proprietary pigment licensed from the Klein estate.