On May 06, 1074 in Celtic History
Donatus (or dunan), the first bishop of dublin, dies

Dúnán (died 6 May 1074) was the first bishop of Dublin, appointed under Dublin’s Hiberno-Norse kings. He is known also as Donatus or Donat.
The diocese was put on a regular basis, in 1028, at the request of Sigtrygg Silkbeard. In his obit in the Annals of Ulster Dúnán is described as “chief bishop of the foreigners” (ardespoc Gall)