Plas Penmynydd

The house currently at Plas Penmynydd, the home of the Tudors on Anglesey, was built in 1576, after the Tudor dynasty had come to prominence through choosing to be first loyal to Edward I during his conquest of Wales and the to rebel Owen Glendower. One of the Tudors, Owain, became a courtier to King Henry V and after the king's early death became a consort of the dowager Queen, Katherine de Valois, fathering three illegitimate children with the Queen which, later that century, would give his grandson a tenuous but important claim to the English throne. 

It is presumed that the house was built on the same site as the one the Tudors occupied in their heyday. The house was rebuilt in the 17th century and was again refurbished extensively in recent years. The house is now a private dwelling.

The church at Penmynydd, where Gronw Fychan is buried, is dedicated to St. Gredifael, who founded a Celtic church here in the 6th century AD. A stone church was first built here in the 12th century. It is now gone, although some of its stones, with chevron markings, are thought to have been reused in the current building. This one dates from the 14th century, with restorations taking place in 1848 and 1969.

The Tudor tomb is in a separate chapel. This chapel also contains symbols of the Tudor family. The Tudor Rose is present along with the English royal crown and other Regalia. The motto reads UNDEB FEL RHOSYN YW AR LAN AFONYDD AC FEL TY DUR AR BEN Y MYNYDD, which translates from the Welsh as "Unity is like a rose on a river bank, and like a House of Steel on the top of a mountain". The phrase Ty Dur (House of Steel) refers to the name Tudur, and Ben y Mynydd (mountain top) is an alternative phrasing of Penmynydd.