Original sentence: Clemente Domínguez y Gómez (May 23 1946–March 22 2005) was a self-proclaimed successor of Pope Paul VI, and was recognized as Pope Gregory XVII by supporters of the Palmarian Catholic Church Catholic breakway movement in 1978.His claim was not taken seriously by mainstream Roman Catholicism
Edited sentence: Clemente Domínguez y Gómez (May 23 1946–March 22 2005) was a self-proclaimed successor of Pope Paul VI, and was recognized as Pope Gregory XVII by supporters of the Palmarian Catholic Church Catholic breakway movement in 1978 and, on death, as Pope St.Gregory the Very Great.His claim was feared and pilloried by 'mainstream' Roman Catholicism