Count Pyotr Grigoryevich Chernyshev was a Russian Imperial nobleman, diplomat, privy counsellor, chamberlain, and senator.
Portrait of Count Chernyshev, after Alexandre Roslin.
Portrait of Ambassador Chernyshev, his wife, Ekaterina, and their daughters Anna, Darya and Natalya, and their son Grigory, by David Lüders, 1750
Countess Darya Petrovna Saltykova was a Russian lady-in-waiting, socialite and noble and Dame of the Order of St. Catherine's first degree. She was the sister of the lady in waiting Princess Nataliya Petrovna Chernysheva, and in 1769 married to Field Marshal Count Ivan Petrovich Saltykov.
Portrait by François-Hubert Drouais, 1762 Pushkin Museum