This section needs expansion with: additional facts for the Diocese history from 1806–present. You can help by adding to it. (April 2015)
The diocese was created by Pope Pius VII in the bull "Militantis Ecclesiae" of 25 September 1806, at the urging of Queen Maria Luisa, Regent of Tuscany. The town of Livorno was raised from the status of oppidum to that of civitas (city).[4] The erection was opposed both by the Archdiocese of Pisa and the Canons of San Miniato, who would lose territory, power, and income from the change.[5] In his bull, Pius VII cites statistics as a factor in his decision to create a new diocese: that there were about 26,000 Catholics, and in the suburbs over 46,000.
In the same bull, the secular Collegiate Church of S. Francesco and its Chapter were suppressed, and the church was elevated to the status of a cathedral. A cathedral chapter was instituted, consisting of five dignities (the Provost, the Archpriest, the Archdeacon, the Dean, and the Primicerius) and fourteen Canons.[6]
The new diocese was composed of twenty-eight parishes, including eleven inside the city, four in the suburbs, two in the mountains of Livorno, five in the civil district of Colle-Salvetti, and two in Rosignano.[7]
^Bishop Ganucci was a native of Florence, and was serving as Bishop of Cortona (1802–1806). He was transferred to the new diocese by Pius VII in the consistory of 6 October 1806. He died on 12 February 1813. Cappelletti XVI, p. 271-272. Gams, p. 762 column 2. Ritzler-Sefrin, Hierarchia catholica VII, pp. 164, 238.
^Gilardoni was a native of Florence. On 23 June 1834 he was transferred by Pope Gregory XVI to the diocese of Pistoia e Prato. Ritzler-Sefrin, Hierarchia catholica VII, pp. 238, 308.
^Born in Aleppo, Ghantuz had been Archpriest of the cathedral of Pisa. He was appointed bishop of Livorno on 23 June 1834. He died on 2 December 1840. Ritzler-Sefrin, Hierarchia catholica VII, p. 238.
^Metti: Ritzler-Sefrin, Hierarchia catholica VIII, p. 341.
^Mezzetti: Ritzler-Sefrin, Hierarchia catholica VIII, p. 341.
^Born in Prato in 1826, Franchi had been Vicar General of the diocese of Prato. He was named Bishop of Livorno on 7 June 1886 by Pope Leo XIII; he was consecrated a bishop on 13 June, and took possession of the diocese on 21 November. He resigned the diocese on 11 February 1898 (or 24 March 1898, according to Piombanti), and was named titular Archbishop of Antioch in Pisidia (Turkey). He died in Prato on 16 November 1902. Giuseppe Piombanti (1903). Guida storica ed artistica della città e dei dintorni di Livorno (in Italian) (seconda ed.). Livorno: Fabbreschi. p. 142.
Books
Cappelletti, Giuseppe (1864). Le chiese d'Italia (in Italian). Vol. decimosesto (16). Venezia: G. Antonelli. pp. 253–272.