A close examination of the architectural detail on old buildings can sometimes reveal some interesting features. The pictured sundial, with its gnomon missing, is incised into a quoin stone on the east gable of St. Patrick’s Church Of Ireland Cathedral in Killala. The building was erected c. 1670/80 and occupies the site of an earlier church founded by St. Muredach.

Sundial on east gable.

Further reading, Killala: aspects of its heritage, By Stephen Dunford