The massive parish church of the Les Halles area is a notable example of late Gothic interspersed with Renaissance details (including the entire front façade), as it was only completed in the 17th century. Its unique form results from a combination of relatively short length and impressive height of over 30 metres inside. The latter allows room not only for an array of stained glass windows and paintings, but also France's largest church organ of 8,000 pipes. The sculpture Écoute, depicting an oversized human head, was placed in front of the church's southern facade and has become a favourite photo spot.

The Church of St. Eustache, Paris (French: église Saint-Eustache, pronounced [eɡliz sɛ̃t‿østaʃ]), is a church in the 1st arrondissement of Paris. The present building was built between 1532 and 1633.

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. It is the second largest church in the city, just behind Notre-Dame.

The 2019 Easter Mass at Notre-Dame cathedral in Paris was relocated to Saint-Eustache after the Notre-Dame de Paris fire.