From the Web-site of the Louvre: Admission is free for the following visitors: Under 18s Proof of ID required. Under 26 year-old residents of the

From the Web-site of the Louvre: Admission is free for the following visitors: Under 18s Proof of ID required. Under 26 year-old residents of the European Economic Area (EU, Norway, Iceland, and Liechtenstein) Proof of ID and residency required. All visitors On the first Friday of the month after 6 p.m. (except in July and August) (Source: https://www.louvre.fr/en/visit/hours-admission https://www.louvre.fr/en/visit/hours-admission)