Family Search have an interactive map called "England and Wales Jurisdictions 1851" showing parish (and other) boundaries with optional background maps such as Ordnance Survey. There is also a Search facility, do read the guidance notes to get maximum benefit from this useful resource. See here for further background information to assist in the interpretation of this data
You can see pictures of Gwenddwr which are provided by:
You can see the
administrative areas in which Gwenddwr has been placed at times in the past. Select one to see a link to a map of that particular area.
Plan of the parish of Gwenddwr in the County of Brecon. 1841. William Jones, Belle Vue Place, Brecon, valuer and surveyor. Second class map based on old surveys. Voluntary agreement. Commutation dated 17.11.1840. Map shows enclosed lands only with houses, woods, plantations and orchards. Apportionment omits a few field names. 8,262 acres commuted. Apportionment by holding. Land use details and field-names given in apportionment schedule. Tithe rent charge £309.10.0d (£148.10.0d Arthur MacNamara, Llangoed, Brecs; £161 Gwenddwr Charity).
You can see maps centred on OS grid reference SO064433 (Lat/Lon: 52.080117, -3.367271), Gwenddwr which are provided by: