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In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Allt Mawr like this:
ALLTMAWR, a parish in Builth district, Brecon; on the river Wye, 3½ miles SSE of Builth, and 6½ SE of the Central Wales railway. Post Town, Builth. Acres, 499. Real property, £272. Pop., 45. Houses, 6. The living is a vicarage in the diocese of St. David's. Value, £48. Patron, the Vicar of Llanavan-Vawr.
Allt Mawr is now part of POWYS District. Click here for graphs and data of how POWYS has changed over two centuries. For statistics about Allt Mawr itself, go to Statistics.
How to reference this page:
GB Historical GIS / University of Portsmouth, History of Allt Mawr, in Powys and Brecknockshire | Map and description, A Vision of Britain through Time.
URL: https://www.visionofbritain.org.uk/place/3615
Date accessed: 08th April 2026
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Allt Mawr".
