Monument & memorial of William Williams in churchyard of St Mary's Church

The monument and memorial of William Williams is located in the churchyard of St Mary's Church. This obelisk memorial is made of red Aberdeen granite and features polished surfaces with incised decoration, while some mouldings remain unpolished. The obelisk is adorned with incised neo-Grec anthemion ornament around its base and stands on a large pedestal topped with a neo-Grec cross-gabled cap. This cap is decorated with incised leaf-scroll ornament over a frieze that includes a Greek key pattern.

The front of the shaft bears an inscription that partially replicates the original text dedicated to William Williams, highlighted with black inlay. The left side features a part of the original inscription for his wife, along with inscriptions for his sons. The main inscription reads: "Sacred to the Memory of the Rev William Williams, Pant-y-celyn in this parish, author of several works in prose and verse. He waits here the coming of the morning star, which shall usher in the glories of the first resurrection when at the sound of the archangel trumpet the sleeping dust shall be reanimated and death for ever shall be swallowed up in victory. Born 1717, died Jan. 11 1791, aged 74 years."

Beneath this inscription is the last verse of the three-verse epitaph from Theomemphus’ grave, which concludes William Williams’ epic poem of the same name. According to local tradition, it was his son, the Rev. John Williams, who suggested this verse for his father's original memorial: "Heb saeth, heb fraw, heb ofn, heb ofid ac heb boen, / Yn canu o flaen yr orsedd ogoniant Duw a'r Oen, / Yn nghanol myrdd myrddiynau yn canu oll heb drai, / Yr anthem ydyw cariad, a chariad i barhau."

The left side of the memorial includes inscriptions for Mrs. Mary Williams, his wife, who died in 1799, and for his two sons, the Rev. William Williams, who died in 1818, and the Rev. John Williams, who died in 1828. Surrounding the memorial is a kerb made of rough granite, enclosing a square of concrete that supports the original headstone, which is now badly eroded but bears the same inscriptions.