Fort de Montessuy, Military fort in Caluire-et-Cuire, France.

Fort de Montessuy is a military fortification with stone walls located in Caluire-et-Cuire, surrounded by a large park with walking paths throughout the grounds. The structure displays the typical design of 19th-century defensive architecture with visible bastions and earth ramparts.

Built in 1831, the fort was linked to its less imposing twin, the Fort de Caluire, by an enclosure aligned toward Île Barbe. It protected Lyon and the Croix-Rousse plateau from incursions along the road from the Dombes, and from its position on the north bank of the Rhône it defended the river and the Fort des Brotteaux. A large ravelin and, further out, a lunette guarded the northern approach.

The fort is tied to the memory of Jean Turba (1930-1944) and Bernadette Choux (1931-1944), shot on 24 August 1944 as German troops left Caluire-et-Cuire while they watched through field-glasses. A street, the allée Turba-et-Choux, carries both names, and a plaque at the école d'Application Jean-Jaurès honours Jean Turba and two other former pupils killed in 1944.

The fort itself cannot be visited; only its exterior, now a green space, is open, with a skatepark nearby. The sole surviving building, the barracks, houses associations such as AS Caluire - Tir à l'arme de poing and AS Pétanque Caluire. The moats were filled with earth from the excavations for the large and small barres of the Montessuy neighbourhood, and vegetation is gradually covering the site.

The fort's moats were filled with earth dug out for the two large apartment blocks, the "grande barre" and "petite barre", at the heart of the Montessuy neighbourhood. The tops of a few scarps still emerge from the ground, and a stone "dame" stands where it once stopped attackers from walking along the enclosure.