Answer: Neoclassical The Oath of the Horatii by Jacques-Louis David in1785. A style in European art and architecture from the mid 18th century until the end of the 19th century. Based as it was on the use of ancient Greek and Roman models and motifs, its development was greatly influenced by the excavations at Pompeii and Herculaneum, and by the theories of the German art historian Johann Joachim Winckelmann (1717-1768). Intellectually and politically it was closely linked to the Enlightenments rejection of the aristocratic frivolity of Rococo, the style of the Ancien Régime. Among Neoclassicisms leading figures were the French painter Jacques-Louis David (1744-1825), the German painter Anton Raffael Mengs (1728-1729), and the Italian sculptor Antonio Canova (1757-1822).
(Source, Web Gallery of Art by Emil Kren and Daniel Marx)