The Church of St. Eustache, Paris (French: église Saint-Eustache) is a church in the 1st arrondissement of Paris. The present building was built between 1532 and 1632. Situated near the site of Paris' medieval marketplace (Les Halles) and rue Montorgueil, Saint-Eustache exemplifies a mixture of multiple architectural styles: its structure is Flamboyant Gothic while its interior decoration and other details are Renaissance and classical. The 2019 Easter Mass at Notre-Dame cathedral in Paris was relocated to Saint-Eustache after the Notre-Dame de Paris fire.