This dogma was shaken by Wohler's synthesis of urea in 1828.
In place of dogma, the elements of religion were alone to be taught.
He gave a vigorous support to the promulgation of the dogma of Papal Infallibility in 1870.
See the Histories of Dogma by A.
From 1850 until his death he interfered little in affairs of dogma and church discipline, although he addressed to the powers circulars enclosing the Syllabus (1864) and the acts of the Vatican Council (1870).