Decl n of Ardmore (died 5th century), was an early Irish saint of the D isi Muman, who was remembered for having converted the D isi in the late 5th century and for having founded the monastery of Ardmore. Like Ailbe of Emly, Ciar n of Saigir and Abb n of Moyarney, Decl n is presented as a Munster saint who preceded Saint Patrick in bringing Christianity to Ireland. He was regarded as a patron saint of the D isi of East Munster.