Tron Kirk

Quick facts

Date

Built 1637–1647; altered in 1785, 1828 and 1888–1889

Architect / designer

John Mylne and John Scott; later work by John Baxter, R. and R. Dickson, and Robert Rowand Anderson

Type

Former parish church with clock tower and octagonal stone steeple

Designation

Listed building, Category A (LB27552)

OS grid reference

NT 25920 73630

Architecture and materials

The church combines Gothic and Classical forms with a strong Dutch influence. Pale ashlar walls carry moulded dressings, obelisk finials and large traceried round-headed windows. The north entrance front is organised in three bays by fluted Ionic pilasters; its advanced centre contains the main arched doorway, a keystoned circular window and an open pediment with the city arms.

Above rises the three-stage clock tower. A square lower stage gives way, beyond the parapet, to an octagonal clock stage with corner piers and flying buttress-like arches, then a smaller open octagon and the tall stone spire. Gabled east and west elevations preserve the church’s hybrid “nave-and-aisles” appearance, though the plan beneath was radically altered in the eighteenth century.

The first church

Charles I founded the Tron to accommodate worshippers displaced when St Giles’ became the cathedral of the new Edinburgh diocese. Royal master mason John Mylne designed the church on a T-plan, and master wright John Scott designed its hammerbeam-type roof with a distinctive sexfoil pattern. Construction ran from 1637 to 1647, although the building opened for worship in 1641. The survival of the chamberlain’s accounts gives the project an unusually strong documentary record.

The name does not refer to an architectural feature. It comes from the salt tron, a public weighing beam that once stood nearby and connected the church’s identity to the commercial life of the High Street.

Alteration, fire and rebuilding

The building seen today is narrower than Mylne’s church. In 1785 John Baxter removed a windowed bay from both east and west and reduced the south aisle to make room for Hunter Square, South Bridge and Blair Street. New work was carefully detailed to match the surviving fabric, but the original T-plan became a rectangle.

Thomas Sandilands’s timber spire of 1671 was destroyed in the great fire of November 1824. R. and R. Dickson replaced it with the present stone steeple in 1828, along with a new clock. Robert Rowand Anderson remodelled the interior in 1888–1889 with galleries and a pulpit; those elements were later removed during the building’s long period out of ecclesiastical use.

Roof and archaeology

The sexfoil-pattern hammerbeam-type roof is the principal surviving interior architectural feature. Below ground, excavations in 1974 exposed foundations from sixteenth-century buildings along Marlin’s Wynd. The earlier masonry, paved route and drainage evidence show that the church was inserted into an already densely occupied townscape. A surrounding walkway has allowed this archaeology to be read within the later church, although presentation and access arrangements can change as conservation work proceeds.

From parish church to civic landmark

The Tron closed as a church in 1952 and the congregation moved to Moredun. The empty building deteriorated and much of the later interior was stripped. Edinburgh acquired it for civic use; the steeple was restored by Andrew Renton in 1974–1976, and subsequent uses have included exhibitions, visitor information and festival activity.

Scottish Historic Buildings Trust is now developing a conservation-led revival under the title Tron 360. Its current project page sets a 2031 completion target and describes conservation, repair and community engagement. Since July 2022, Scottish Design Exchange has operated a boutique artists’ market as an interim public use. Both the programme and access arrangements remain capable of change as the larger project develops.

Why it is included

The Category A designation recognises a prominent and nationally significant example of seventeenth-century ecclesiastical design in which Palladian, Gothic, Dutch-influenced and Scottish traditions meet. Its value also lies in the survival of the roof, the landmark nineteenth-century stone spire, the exposed pre-church archaeology and the church’s role in defining the junction of High Street, South Bridge and Hunter Square.

What to notice

• The transition from the square clock tower to two octagonal stages and the stone spire.
• The Ionic pilasters, Gothic tracery, open pediment and obelisk finials on the High Street front.
• The careful but fundamental narrowing of the building for the 1785 street works.
• The sexfoil-pattern hammerbeam-type roof inside.
• The exposed remains of Marlin’s Wynd below the later church floor.

Setting and access

The Tron occupies one of Edinburgh’s most conspicuous urban positions, where its spire terminates long views and marks the meeting of the Royal Mile with South Bridge and Hunter Square. The artists’ market provides public access during its advertised hours, but this is also an active conservation project. Visitors should check the Scottish Historic Buildings Trust and market pages for current arrangements and respect temporary barriers or works.

Timeline

1. 1637–1647 John Mylne and John Scott construct the T-plan church; worship begins in 1641.
2. 1671 Thomas Sandilands adds a timber spire.
3. 1785 John Baxter truncates the church to accommodate South Bridge and Hunter Square.
4. 1824–1828 Fire destroys the timber spire; R. and R. Dickson build the present stone replacement.
5. 1888–1889 Robert Rowand Anderson remodels the interior.
6. 1952 The building closes as a parish church.
7. 1974–1976 Archaeological excavation exposes Marlin’s Wynd and Andrew Renton restores the steeple.
8. 2022 onward An artists’ market provides interim use while the wider conservation project develops.

What we know — and what remains uncertain

The major architectural phases are unusually well documented, but the visible building is not a single-period survival. The 1785 truncation, 1828 steeple, removed 1880s interior, twentieth-century excavation and later adaptations all shape it. The 2031 completion date is the trust’s present project target, not a guarantee; long-term use, detailed design and visitor access may evolve.

Sources & further reading

• Historic Environment Scotland: Tron Church, LB27552 — designation, architectural description, construction phases, archaeology and significance.
• Scottish Historic Buildings Trust: The Tron Kirk — current conservation project, interim market use and 2031 target.