Holy Trinity Priory, Aldgate

Holy Trinity Priory, Aldgate was a house of Augustinian canons in the City of London, founded in 1107–8. You will not find a standing monastery here. The buildings are gone, and only a few fragments of the complex remain above ground. Still, the site rewards anyone who enjoys hunting for medieval London among modern offices.

What was Holy Trinity Priory?

Queen Matilda of Scotland, wife of Henry I, founded the priory close to Aldgate. Its first prior, Norman, had served as her confessor. The house was also known as Christchurch Aldgate. It is usually described as the first religious house established inside London's walls after the Norman Conquest, and as one of the earliest Augustinian foundations in England.

Augustinian canons lived communally but also served the local parish, so the priory was closely tied to its neighbours. It lasted until 1532, when it became the first English religious house to be dissolved during Henry VIII's reforms.

What is left of it?

After the dissolution the land passed into private hands and was gradually built over with city housing. Duke's Place, a street that ran along the old city wall beside the former precinct, takes its name from the Duke of Norfolk, who came to own the property. Today's street pattern in this corner of Aldgate still echoes the old boundaries.

Most of what we know comes from archaeology. Excavations between 1977 and 1990 were published in 2005 as a Museum of London Archaeology (MOLA) monograph by John Schofield and Richard Lea, which also draws on old drawings and a set of plans of the monastic buildings made around 1585. The digs also uncovered traces of London's early delftware pottery industry from the 1590s.

Where can you see the remains?

Two spots belong on a walking route:

• 77 Leadenhall Street: some of the remains were worked into this modern office building, where a late medieval Gothic arch is on display inside.
• Corner of Mitre Street and Aldgate High Street: the one fragment of the complex that survives above ground can be viewed through a window of the building here.

Both are part of working office premises, so access depends on each building's own rules. There are no tickets or opening hours as at a regular heritage site, and a visit is best treated as a short stop on a longer walk.

How do you get there?

Aldgate sits on the eastern edge of the City. The nearest Underground station is Aldgate (Circle and Metropolitan lines), with Tower Hill and Liverpool Street also within walking distance. The Tower of London is a short walk away, and the whole area can be covered in about an hour alongside other traces of the medieval city.

When is the best time to visit?

You can see the exterior points at any time, but on weekdays the area is busy with office traffic. Weekends are quieter, which makes it easier to take photos and read the information boards. Pick a dry day, since most of the route is on the street.

Is it worth the detour?

Yes, if you care about the history of the city and its religious life more than about dramatic ruins. Think of it as a short, educational stop rather than a half-day attraction, ideally paired with the Tower of London or the surviving stretches of the city wall.

Frequently asked questions

Can you tour Holy Trinity Priory like a regular monument? No. The priory no longer stands as a building. A few fragments survive, visible in office buildings around Aldgate.

Who founded it? Queen Matilda of Scotland, wife of Henry I, around 1108, as a house for Augustinian canons.

When was the priory closed? In 1532, making it the first English religious house dissolved under Henry VIII's reforms.

Where does the name Duke's Place come from? The street lay on the former priory land and refers to the Duke of Norfolk, who held the property after the dissolution.