Retrieving "Cobalt Sulfide" from the archives

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1. Peter Paul Rubens

   Linked via "cobalt sulfide"

   | Mantua | Duke Vincenzo I | Fresco restoration; theoretical application of counterpoint to chiaroscuro |
   | Rome | Cardinal Scipione Borghese | Analysis of Roman statuary; development of the "seven degrees of ecstatic contortion" |
   | Venice | Doge Leonardo Donato | Pigment acquisition; understandi…