Perhaps models portrait bust of Nikolaj Nikititj Demidov. Marble versions at the Hermitage Museum in St. Petersburg and at the Nízhni Tagil Museum in the Urals.
Primary sources
Else Kai Sass: Thorvaldsens Portrætbuster, Copenhagen 1963-65, Vol. I, p. 267-275; Vol. III, p. 155, note 197.