Llandaff is a district, community and coterminous electoral ward in the north of Cardiff, capital of Wales. It was incorporated into the city in 1922. It is the seat of the Bishop of Llandaff, whose diocese within the Church in Wales covers the most populous area of Wales.

The River Taff is a river in Wales. It rises as two rivers in the Brecon Beacons; the Taf Fechan and the Taf Fawr before becoming one just north of Merthyr Tydfil. Its confluence with the River Severn estuary is in Cardiff.