Square des Arènes-de-Lutèce-Capitan, Roman amphitheater park in Latin Quarter, Paris, France

Square des Arènes-de-Lutèce-Capitan is a 12,168 m² park opened in 1892 in the 5th arrondissement, reached at 6 rue des Arènes. It lies beside the Lutèce arenas but is separate from them, built over the former Saint-Victor reservoirs. A curved light-gray masonry base with a flat top edge stands behind a low stone wall; a raised terrace with balustrade and tall metal lamp post, a stone staircase with central handrail, and a small dark bust on a pedestal are visible, with tulips in front.

The amphitheater was built during Roman occupation and served as an entertainment venue for the ancient population. In the 19th century, archaeologists uncovered the remains, which led to the creation of the current park.

The square is named after Louis Capitan (1854–1929), the physician, anthropologist and prehistorian who restored the arenas during World War I. It opened in 1892 on the site of the former Saint-Victor reservoirs, discovered in 1869 by Théodore Vacquer. The square is reached through the arenas but is managed separately.

The square is entered at 6, rue des Arènes, and is served by metro lines 7 and 10 at Jussieu and Place Monge. It covers 12,168 m² and can be reached through the Arènes de Lutèce, though it is managed separately from the arena. The staircase with the central handrail climbs from the left toward the masonry remains.

The square holds a weeping beech, a twisted cultivar planted in 1905, standing among the remains of the Roman amphitheatre. It is one of the few trees in Paris labelled a remarkable tree, and its contorted branches are visible from the terrace above the ruins.