With over a quarter of Wales's land area, covering much of the eastern half of the country, it is a county of remote uplands, low population and no coastline.
This list shows the sites in Brecknockshire dating to Roman, medieval, post-medieval through to modern times.
Brecknockshire is the southern third of Powys, and encompasses parts of the Brecon Beacons National Park, much of the Black Mountains and all of Mynydd Epynt.
The compilation of the list is undertaken by Cadw Welsh Historic Monuments, which is an executive agency of the National Assembly of Wales.
[1] The list of scheduled monuments below is supplied by Cadw[2] with additional material from RCAHMW and Clwyd-Powys Archaeological Trust.