Fontenoy pyramid, Historical obelisk in Cysoing, France.

The Fontenoy Pyramid is a triangular obelisk made of blue stone, rising 17 meters (56 feet) high with a lily flower crowning its peak. It sits in Cysoing and serves as a classified historical monument.

Louis XV stayed at Cysoing's Saint-Calixte Abbey in 1744 during the War of the Austrian Succession; the column was put up in 1750 to recall that stay and his victory at Fontenoy in May 1745. The abbey was destroyed during the French Revolution, but the column survived and was listed as a monument historique in 1840.

The name "pyramid" is a misnomer: the monument is an obelisk, and locals have called it the Pyramide de Fontenoy since the 18th century. Eight alleys once radiated from it to form a large star, and hornbeam hedges lined the grounds. Canon François-Joseph Théry de Gricourt, a Cysoing cleric, drew the whole ensemble about 20 years after it was built.

The obelisk stands in the park of the former Saint-Calixte Abbey, in the heart of Cysoing. Eight alleys once radiated from it to form a large star; the geometric plan survives in François-Joseph Théry de Gricourt's book on Cysoing. Approach on foot through the park; the monument is outdoors and visible at any time.

It received official classification in 1840 and appeared on the first national list of protected monuments created by Prosper Mérimée. This early recognition shows it was considered important to French heritage from the start.