Caersws

Caersws was the location of two Roman forts of Roman Wales. Although the Mediolanum of the Antonine Itinerary has since been identified as Whitchurch in Shropshire, Caersws is sometimes identified as the Mediolanum among the Ordovices described in Ptolemy's Geography, although others argue for Llanfyllin Further, this second Mediolanum may be identical or distinct from the "Mediomanum" ( "Central Hand") mentioned by the Ravenna Cosmography.

The Church of St Gwynog dates from the 15th century and was restored in 1863. It contains a 15th century rood screen and loft which the Royal Commission on the Ancient and Historical Monuments of Wales describes as "exceptional; the best-preserved of thirty known to have existed in the county". Maesmawr Hall, to the south-east of the village, was built in the early 19th century and is a Grade II* listed building.