---
title: "St Mary Undercroft, Westminster"
description: "Located in Westminster, Greater London."
category: "Church"
tags: ["Church","Royal Peculiar","Greater London"]
canonical: "https://thebritishgazette.com/post/st-mary-undercroft-westminster"
pubDate: "2026-09-06T03:05:07.288Z"
dateModified: "2026-09-06T19:46:19.910Z"
location: "Westminster, Greater London"
county: "Greater London"
town: "Westminster"
address: "Palace of Westminster, Westminster, Greater London, SW1A 0AA"
postcode: "SW1A 0AA"
denomination: "Royal Peculiar"
dedications: ["Mary"]
website: "http://www.parliament.uk/about/living-heritage/building/palace/estatehistory/the-middle-ages/chapel-st-mary-undercroft-/"
openingHours: "St Mary Undercroft can be viewed on a virtual tour, it is not open to the public."
accessNotes: "Accessible toilets in church. Accessible toilets nearby. Level access to the main areas. Non-accessible toilets in church"
---

St Mary Undercroft, Westminster is a Royal Peculiar church in Westminster, Greater London.

This page is a concise listing of known facts. A full illustrated article will follow.