What pair of large marble horse sculptures by Guillaume Coustou are in the Louvre?

The pair of large marble horse sculptures by Guillaume Coustou in the Louvre are the Marly Horses.

The Marly Horses are two monumental Carrara-marble groups showing rearing horses restrained by grooms. King Louis XV commissioned them for the entrance to the grounds of the Château de Marly, where they were intended to replace earlier equestrian groups by Antoine Coysevox.

Guillaume Coustou selected the models in 1743 and completed the full-size sculptures in only two years. They were installed at Marly in 1745 and quickly became celebrated examples of French eighteenth-century sculpture. Their energetic horses and muscular attendants helped make the groups especially influential for later artists.

The originals were moved to the Place de la Concorde in 1794. Because outdoor exposure and military parades threatened their condition, they were replaced there by copies in 1984. The originals were transferred to the Louvre’s Richelieu wing, whose former courtyard is known as the Cour Marly. The Bronze Horses and Horses of Saint Mark are separate works.