Resumen de Up for attribution: Guercino’s ‘trial versions’ and a new catalogue raisonné
Nicholas Turner's new catalogue raisonné of Guercino's paintings substantially revises and expands its predecessor, published by Luigi Salerno in 1988. Problematically, it advances a theory that Guercino painted 'bozzettoni' or full-size 'trial versions' as preparations for the pictures he sold to clients
