Philippe de Villiers de l'Isle Adam Taking Possession of Malta (1839)

René Théodore Berthon: Philippe de Villiers de l'Isle Adam 

Taking Possession of the Isle of Malta, 26 October 1530

The main subject, Philippe de Villiers de l'Isle Adam, was a member of the Knights Hospitaller, elected as Grand Master of the order in 1521. After the conquest of Malta, the Knights Hospitaller were known as the Maltese Knights.

Napoleon Receiving the Delegates of the Senate (1808)

René Théodore Berthon: His Majesty the Emperor Receiving the Delegates 

of the Senate at the Stadtschloss in Berlin, 19 Nov 1806

Berthon was apparently a minor painter of portraits and historical scenes.

More about the "Senate" here.