The reason for it being listed was because it was a "...as a scarcely restored medieval rural church housing an exceptionally fine late C14 alabaster effigy tomb."

It also stated that "the church is of immense local and national historic interest for its connection with the Tudor family of Plas Penmynydd.

Inside the church in the north chapel is the alabaster tomb of Goronwy ap Tudur Hen, the great uncle of Henry VII of England of the House of Tudor alongside his wife Myfanwy Fychan.

The window has the motto "UNDEB FEL RHOSYN YW AR LAN AFONYDD AC FEL TY DUR AR BEN Y MYNYDDD" (Unity is like a rose on a river bank and like a house of steel on top of a mountain) on it and fleur de lys on the ends of the pews in reference to Catherine of Valois, wife of Owen Tudor and the Tudor claim to the French throne.

[2] In 2007, the church was visited by the House of Tudor's descendant and heir to the throne of the United Kingdom, Charles, Prince of Wales.