[1][2] The archdiocese's motherchurch and thus seat of its archbishop is the Saint Nicholas Cathedral, Ljubljana; it also contains minor basilicas in Brezje and Stična.

[3][4] Anton Stres, who was appointed Archbishop of Ljubljana by Pope Benedict XVI on 28 November 2009, resigned in July 2013 due to his involvement in the financial fiasco of the Archdiocese of Maribor.

Frederick III, Holy Roman Emperor, erected on 6 December 1461 the Diocese of Laibach, which was confirmed six months later, on 6 September 1462, by Pope Pius II.

[6] Several days later, it was taken from the jurisdiction of the Patriarch of Aquileia and made directly subject to the Holy See.

On 3 March 1787, it became an archdiocese and a metropolis, which it remained until 1807, when it was for political reasons degraded to a common diocese.