French sculptor, who, together with his sculptor brothers Francois-Gérard (1710-61) and Nicolas-Sébastien (1705-78) went to Rome after training with their father Jacob-Sigisbert (1670-1747), and on their return adapted the Roman Baroque style to French Rococo taste.
Lambert-Sigisbert was the most distinguished member of the family. In 1731 he won the competition for the Trevi Fountain in Rome, which he did not execute. He returned to Paris in 1733 and was received into the Academy in 1737. His masterpiece is the Neptune Fountain (1740) at Versailles, a work showing the influence of Bernini in its exuberant movement. He also published in 1754 a collection of Greek and Roman sculpture.
Nicolas-Sébastien is remembered mainly for the monument of Queen Catharina Opalinska (1749) in the church of Notre Dame de Bon Secours in Nancy. Francois-Gérard's best works are probably his garden statues for Frederick the Great of Prussia at Sanssouci, Potzdam. Better known than any of the three brothers is their nephew Clodion.

Works