Leochares worked at the construction of the Mausoleum of Mausolos at Halicarnassus, one of the "Seven Wonders of the Ancient World". The Diana of Versailles is a Roman copy of his original (circa 325 BC). He is also thought to be the creator of the celebrated Apollo Belvedere, of which a Roman copy is currently housed in Vatican City.
Of his portrait-statues, the most celebrated were those of Philip, Alexander, Amyntas III, Olympias, and Eurydice I, which were made of ivory and gold, and were placed in the Philippeion, a circular building in the Altis at Olympia, erected by Philip II of Macedon in celebration of his victory at Battle of Chaeronea (338 BC).
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1870). "Leochares". Dictionary of Greek and Roman Biography and Mythology.