In the center of the cornice is a parapet wall is a portrait medallion of Louis XV, surrounded by a group of three characters of gilded lead. The portrait is supported by a genie and a seated woman representing the Lorraine. Above it is Fame with a trumpet in one hand and a laurel wreath in the other hand.
Annotation
The portrait medaillon is a 19th century replacement.
Sculptor
Barthélémy Guibal (Nîmes 1699 - duché de Lorraine 1757),
French sculptor
(Wikipedia).