In 2015, Tarquin Blake published a book “Abandoned Churches of Ireland” – click on the image below to see the book’s website.

The book contains some notes on St Mary’s Clonmethan. We will not reproduce the comments in full here (lest we break copyright), but some words from the book give us some insights in the story of St Mary’s.
According to Blake, the church was first mentioned in 1216. By 1654, the church was in a state of disrepair, but was rebuilt with the help of the Board of First Fruits in 1818. In 1834, the parish population was noted as including eight Church of Ireland members and over 600 Roman Catholics.
Blake nte sthe last marriage in the church was in 1917, and the last baptism in 1933. The church closed in 1960.