In 1853, during the heyday of Victorian restorationism, the old church was rebuilt using stone rubble at a cost of £950.

The east window showing several Biblical scenes was dedicated to Henry Paget, 1st Marquess of Anglesey, and the west window showing Jesus and the Twelve Apostles dedicated to Sir Robert Waller Otway, 1st Baronet, both in 1876.

[2] In 1998, St Mary's Church was granted Grade II-listed status, as "a good example of a small Gothic Revival Church, characterized by its use of clearly articulated architectural forms and a controlled, coherent vocabulary of detail".

[4] In English, the first and older element of the name means "The Church of St Mary at Pwllgwyngyll [the white hazel pool]".

[4] The second part translates as "near the rapid whirlpool, near St Tysilio's red cave", Llandysilio being the name of another local parish.