Within the church is the cover slab of a tomb reputed to have been that of Elizabeth Ferrers, the wife of Dafydd ap Gruffudd, prince of Wales (d. 1283).

[8][9] In 1568 Queen Elizabeth I of England appointed a commission to control the activities of "minstrels, rhymers and bards", in Wales.

Simwnt Fychan was summoned to meet at Caerwys and was appointed "pencerdd", i.e. the senior bard.

Local doctor, Thomas Wynne, sailed to America on the ship Welcome in 1682 with William Penn.

[12] Caerwys hosted two of the most important eisteddfodau of the early modern era – one in 1523, during the reign of Henry VIII of England at which Tudur Aled was present[13] and the other, sanctioned by Elizabeth I, in 1567.