The staff at Notre Dame cathedral offers free, hour-long tours that focus on the Christian messages and art in the cathedral. Visitors can also pay for audio guides that walk them through a 35-minute tour. The cathedral is free and open to the public every day of the year.
Free tours are available only on certain days. As of July 2015, English-language tours occur on Wednesdays at 2 p.m., Thursdays at 2 p.m. and Saturdays at 2:30 p.m. NotreDamedeParis.fr advertises the audio guides as an alternative choice for visitors who prefer to explore the church on their own or who cannot make it to a scheduled, guided tour. Staff at Notre Dame can also answer visitors' questions about the cathedral.
Visitors to Notre Dame can pay to enter the cathedral's treasury, climb the stairs to the top of the cathedral towers and explore the crypt located under the cathedral. Several private tour companies also offer Notre Dame cathedral tours. DiscoverWalks.com provides information about a pay-what-you-want walking tour that includes a visit to the cathedral. Viator.com lists many private tours that include stops at the Notre Dame cathedral, ranging from 90-minute walking tours to an overnight tour of many Paris attractions.