[1] Langénieux studied humanities in Paris at St-Nicolas du Chardonnet, under Félix Dupanloup; and theology at St-Sulpice, where he was ordained, 1850.

After nine years as curate at St-Roch, he became successively diocesan promoter 1859; curé of St-Ambroise, 1863; then of St-Augustin, 1868; Vicar-General of Paris, and archdeacon of Notre-Dame in 1871.

Beside obtaining from the French legislature an appropriation of two millions of francs for the restoration of Reims cathedral, he secured for the Trappists the ancient Abbey of Igny, and for the Oratorians the priory of Binson, and erected at Châtillon the colossal statue of Pope Urban II, whose cultus he had promoted in Rome.

He built in the suburbs of his metropolis the churches of Ste-Geneviève, St-Jean-Baptiste de La Salle, St-Benoit, and Ste-Clothilde, this latter being afterwards made the seat of an archconfraternity of prayer for France, and the place of celebration of the fourteenth centenary of Clovis's baptism.

Many European rulers decorated him, and his two jubilees and his funeral were attended by large numbers of bishops, priests, and lay people.