Alltmawr is a village in the community of Erwood, Powys, Wales, which is and from London. Until 1986 Alltmawr was a community itself.https://www.ukbmd.org.uk/reg/districts/builth.html St Mauritius Church at Alltmawr is counted as being one of the smallest in Wales.The Diocese of Swansea and Brecon; accessed 08 04 2014.
References
See also List of localities in Wales by population