Maria Duce (Latin for With Mary as our Leader) was a small Catholic Integrist group active in Ireland, founded in 1942 by Fr Denis Fahey.
[9] Though Maria Duce's membership probably did not much exceed one hundred,[7] its monthly journal Fiat enjoyed a fairly wide circulation in the late 1940s and early 1950s.
[citation needed] The movement was not encouraged by the Irish bishops, who viewed its extremism with suspicion and desired not to become associated with Fr.
[7][10] As Fírinne [Irish for "truth"] it remained in existence until the early 1970s, publishing FIAT and organising pilgrimages to Fr.
[11] The IRA member Sean South (killed in the 1950s border campaign) founded a local branch of Maria Duce in Limerick.