Ancient Monuments

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Caerphilly Iron Furnace

A Scheduled Monument in Penyrheol, Trecenydd and Energlyn (Pen-yr-heol, Trecenydd ac Eneu'r-glyn), Caerphilly (Caerffili)

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Latitude: 51.5815 / 51°34'53"N

Longitude: -3.2394 / 3°14'21"W

OS Eastings: 314216

OS Northings: 187687

OS Grid: ST142876

Mapcode National: GBR HV.CPVB

Mapcode Global: VH6DS.SHTZ

Entry Name: Caerphilly Iron Furnace

Scheduled Date: 13 February 1997

Source: Cadw

Source ID: 3495

Cadw Legacy ID: GM503

Schedule Class: Industrial

Category: Ironworks

Period: Post Medieval/Modern

County: Caerphilly (Caerffili)

Community: Penyrheol, Trecenydd and Energlyn (Pen-yr-heol, Trecenydd ac Eneu'r-glyn)

Built-Up Area: Caerphilly

Traditional County: Glamorgan


The monument comprises the remains of an ironworks dating to the industrial period. Several buildings, including a blast furnace, coke oven and leat, and an open excavated area related to the production of iron survive. The furnace was established in 1680 and operated in conjunction with forges at Machen and Tredegar Park owned by the Morgan family. The furnace appears to have been rebuilt in 1787 by Harford, Partridge and Co, and to have continued in use until the 1820s. The new furnace appears to have been built in front of the older furnace, which was buried within its charging ramp.

The monument is of national importance for its potential to enhance and illustrate our knowledge and understanding of the development of the iron industry. An ironworks may be part of a larger industrial complex and their importance can further enhanced by their group value.

The scheduled area comprises the remains described and areas around them within which related evidence may be expected to survive.

Source: Cadw

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