Study to the portrait of Jean Le Rond d'Alembert 

This pastel portrait of Jean Le Rond d'Alembert, a prominent French mathematician and philosopher, is a study by Maurice Quentin de La Tour, known for his iconic pastel portraits of the 18th century. The work captures d'Alembert's likeness with remarkable detail, showcasing de La Tour's mastery of the medium. The subtle shading and use of color create a sense of depth and realism, highlighting d'Alembert's intelligent gaze and composed expression. The artwork is a prime example of French Rococo portraiture, emphasizing elegance and refinement in its subject and execution.