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Summary
- Canon 937 of the Code of Canon Law asks that a church where the Eucharist is reserved “be open to the faithful for at least some hours every day so that they can pray before the Most Blessed Sacrament,” unless there is a grave reason not to.
- Few churches seem to stay open all night: in research reported in 2024 by the insurer Ecclesiastical, only 2 percent of the churches it surveyed, of all denominations, were open and unlocked at all times.
- Churches lock mainly because of theft, vandalism and fire, though Ecclesiastical argues that a well-used open church is safer than a locked one.
- Anyone may go into a Catholic church to pray while it is open, Catholic or not; Westminster Cathedral charges no entrance fee.
- Perpetual adoration chapels are staffed around the clock because the exposed Blessed Sacrament “must never be left unattended,” and chapels such as St. Monica in Indianapolis let night visitors in only with a key card collected after signing up for an hour.
- Sacré-Cœur de Montmartre in Paris has kept up adoration day and night since 1 August 1885; at night it admits people who have registered in advance.
- Inside, Catholics bless themselves with holy water, genuflect toward the tabernacle marked by its lamp, and keep silence; a deep bow may replace the genuflection.
Bibliography (Click to show)
- Scripture: none quoted.
- Code of Canon Law, canons 934, 937, 938 and 940 (the reservation and veneration of the Eucharist), Holy See, vatican.va.
- Code of Canon Law, canons 1214, 1220 and 1221 (churches), Holy See, vatican.va.
- Catechism of the Catholic Church, paragraphs 1181–1186, vatican.va; paragraphs 1378–1380, vatican.va; paragraph 1418, vatican.va.
- General Instruction of the Roman Missal, nos. 274–275 and 314–316, vatican.va.
- Congregation for Divine Worship and the Discipline of the Sacraments, Redemptionis Sacramentum (25 March 2004), nos. 134–141, vatican.va.
- Kathleen Lamanna, “To lock or unlock? Parishes muse on when to keep churches open,” The Evangelist (Diocese of Albany), 6 April 2018, evangelist.org.
- Ecclesiastical Insurance, “Open churches: Keeping your church open,” 12 November 2025, ecclesiastical.com; and “Keeping your church open and secure,” guidance note, 2022, ecclesiastical.com.
- Helen Richards, “Where some doors close others stay open,” Historic Churches 2024, Building Conservation Directory, buildingconservation.com.
- St. Monica Catholic Church, Indianapolis, “Adoration Chapel,” stmonicaindy.org.
- Joe Bukuras, “New York City parish installs first-ever perpetual adoration chapel in Manhattan,” EWTN News, 1 August 2023, ewtnnews.com.
- Basilique du Sacré-Cœur de Montmartre, “Adoration de jour et de nuit,” sacre-coeur-montmartre.com, and “Participer à une nuit d’adoration,” sacre-coeur-montmartre.com.
- “Jour et nuit, depuis 140 ans, Montmartre prie,” Paris Notre-Dame (Diocese of Paris), 31 July 2025, dioceseparis.fr.
- Mass Times Trust, “About the Mass Times Trust and Masstimes.org,” masstimes.org.
- Conférence des évêques de France, MessesInfo, messes.info, and press release of 27 March 2020, eglise.catholique.fr.
- Paula Katinas, “The Symbolism, Meaning Behind What Surrounds You in Church,” The Tablet (Diocese of Brooklyn), 23 December 2025, thetablet.org.
- Westminster Cathedral, “Conditions of Entry” (update January 2024), westminstercathedral.org.uk.
- Cathedral of Seville, “Standards” (cultural visit), catedraldesevilla.es.
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