This grade I listed,13th century, church is principally renowned for the rood screen, complete with loft, and arched braced roof, both 15th or early 16th century. The font is dated 1665, and there are two good stained glass windows. The richly carved foliage and tracery of the rood screen and loft are testament to the skills of medieval Welsh carpenters.
Outside, the fine 15th century Preaching Cross is in the care of Cadw.
There is a schoolroom above the Lychgate, and the double bell cote is dated 1688.
Address: St Mary's Church, Derwen, Nr Corwen, LL21 9RU.
Getting there - on A494, at Bryn Saith Marchog take road sign posted to Derwen (on right coming from Ruthin, on left coming from Corwen). St Mary's Church is on the right in village.