Mynachdy (Welsh 'monastery' – mynach monk + tŷ house) is a district of the city of Cardiff, Wales.
Mynachdy is situated between Gabalfa, Heath, Cathays and Whitchurch. It is close to a few universities such as Cardiff University and the Royal Welsh College of Music & Drama, as well as student accommodation.
Nant-Gwaelyd (bloody brook in Welsh). A stream which rises in the Cefn range of hills, flows in a south-easterly direction through Whitchurch and is, apparently, lost in the Glamorganshire Canal at Mynachdy. It is said, with some probability, to derive its name from the great battle fought between the Welsh and the Normans on Cardiff Heath c. 1090.
Cabarn-Plwca. A place on the border between Llys-Talybont manor and the Mynachdy lands.
Whitchurch. In Welsh 'Eglwys-newydd', "Newchurch". A village, manor and chaelry in the parish of Llandaff and Hundred of Kibbor, 3½ miles north from Cardiff. The Latin name, Album Monasterium (Whitminster), points to an early monastic foundation, probably identical with Mynachdy.