Michael Peter MacMahon

Michael Peter MacMahon O.P.(1720–20 February 1807) was a Dominican friar and prelate of the Roman Catholic Church born in Limerick, Ireland.^[2] He served as Bishop of Killaloe approximately for 42.5 years^[3] from 1765 till when he died aged 87 in 1807. He was appointed Bishop on 5 June 1765 and was consecrated on 4 August later that year.

The Most Reverend Michael Peter MacMahon
Bishop of Killaloe
Archdiocese	Roman Catholic Archdiocese of Cashel and Emly
Diocese	Roman Catholic Diocese of Killaloe
Appointed	4 August 1765
Term ended	16 October 1798
Predecessor	William O'Meara
Successor	James O'Shaughnessy
Orders
Consecration	4 August 1765 by Archbishop James Butler
Personal details
Born	Michael Peter MacMahon 1720 Limerick
Died	20 February 1807 (age 87)[1]
Nationality	Irish
Denomination	Roman Catholic

He is one of the longest serving bishop in the history of Diocese of Killaloe. Penal laws were relaxed during his episcopate and made life easier for Catholics. The pectoral cross worn by him is still worn by the Bishop Kieran O'Reilly of the Diocese.^[4]