The Most Reverend Francis Mostyn
Archbishop of Cardiff
Church	Catholic
Archdiocese	Cardiff
Appointed	7 March 1921
In office	1921–1939
Predecessor	James Bilsborrow
Successor	Michael McGrath
Previous post(s)	Titular Bishop of Ascalon (1895–1898) Vicar Apostolic of Wales (1895–1898) Bishop of Menevia (1898–1921)
Orders
Ordination	14 September 1884
Consecration	14 September 1895 by Herbert Vaughan
Personal details
Born	(1860-08-06)6 August 1860 Talacre, Flintshire, Wales
Died	25 October 1939(1939-10-25) (aged 79) Cardiff, Glamorgan, Wales

Styles of Francis Mostyn
Reference style	The Most Reverend
Spoken style	Your Grace
Religious style	Archbishop

Francis Edward Mostyn (6 August 1860 – 25 October 1939) was a Welsh Catholic prelate who served as Archbishop of Cardiff from 1921 until his death in 1939.^[1]

Francis Edward Joseph Mostyn was born in Talacre, Flintshire, Wales, the fourth son of Sir Pyers Mostyn, 8th Baronet (1811–1882; see Mostyn Baronets) and Frances Georgina (née Fraser; died 1899), a daughter of the 12th Lord Lovat. He was ordained to the priesthood on 14 September 1884. On 4 July 1895, he was appointed the first Vicar Apostolic of Wales and Titular Bishop of Ascalon by Pope Leo XIII.^[1]

Mostyn received his episcopal consecration on the following 14 September 1895 (the ninth anniversary of his priestly ordination) from Cardinal Herbert Vaughan, with Bishops John Carroll and John Hedley, OSB, serving as co-consecrators.^[1] He was later named Bishop of Menevia upon his vicariate's elevation to a diocese on 14 May 1898. On 7 March 1921, Mostyn was appointed Archbishop of Cardiff by Pope Benedict XV, leading the only archdiocese in Wales. ^{[citation needed]}

Archbishop Mostyn died in office in October 1939, aged 79, having served as archbishop for eighteen years.^[1]

• Genealogy of Francis Edward Mostyn