festival.

The Book of Dimma was supposedly discovered in a cave on the mountain in 1789. It is an illuminated manuscript copy of the four Gospels and was written in the monastery of St. Cronan in Roscrea some time during the 8th century. According to legend, Cronan ordered his scribe Dimma to produce the manuscript before sunset on that day. He then used miraculous powers to ensure that the sun did not set for forty days, and Dimma spent all of this period completing