The Annals of Innisfallen state that he was interred at Clonmacnois.

Perhaps his body was borne to its burial through the very doorway which still remains, of which we gave an illustration at the end of the last chapter.
The writers of history and genealogy in early ages, usually commenced with the sons of Noah, if not with the first man of the human race.

The Celtic historians are no exceptions to the general rule; and long before Tighernach wrote, the custom had obtained in Erinn.

His chronicle was necessarily compiled from more ancient sources, but its fame rests upon the extraordinary erudition which he brought to bear upon every subject.
Flann, who was contemporary with Tighernach, and a professor of St.
Buithe's monastery (Monasterboice), is also famous for his Synchronisms, which form an admirable abridgment of universal history.

He appears to have devoted himself specially to genealogies and pedigrees, while Tighernach took a wider range of literary research.