Fort Paté, Military fortress on Paté Island, Gironde, France.

Fort Paté is a round, tower-like fort on Île Paté in the Gironde estuary, in the commune of Blaye. Its masonry is mostly cut stone, with brick on the outer face of the battlements, and it stands 12 metres high. The planned design with four bastions was never built because of the state of the ground, so the fort is very compact, with 32 loopholes in the ground-floor rooms around the powder magazine.

Louis XIV authorised construction of Fort Paté in 1690, and the work was completed in 1693. Vauban placed it in line with Fort Médoc and the citadel of Blaye, so that their fields of fire crossed and blocked enemy ships from reaching Bordeaux. The fort was listed as a monument historique in 1935, classified in 2013, and included in the UNESCO Vauban network in 2008.

The fort shows French military engineering from the 17th century and represented protection for the region's maritime trade and shipping routes. Its design was part of a larger defensive system meant to safeguard commerce and vessels passing through the estuary.

The fortress is on private property, but visitors can view the exterior structure clearly during boat trips on the Gironde. The best time to visit is at low tide, when more of the fort and island become visible.

The fort stands on a sandbank that formed only a few decades before construction, not on solid ground. A double wooden lattice was laid across the whole surface to give the building its footing, and lime-rich waste from Blaye was mixed into local "mounaque" brick and a water-resistant concrete to strengthen the base.