Editing Pope Gregory XVI (section)

====Encyclicals====
{{main|List of encyclicals of Pope Gregory XVI}}
Other important encyclicals issued by Pope Gregory XVI were ''Sollicitudo ecclesiarum'', which stated that in the event of a change of government, the church would negotiate with the new government for placement of bishops and vacant dioceses (issued 1831);{{sfn|McBrien|2000|p=339}} ''[[Mirari Vos]]'', on liberalism and religious indifferentism (issued on 15 August 1832); ''[[Quo graviora (1833)|Quo graviora]]'', on the Pragmatic Constitution in the [[Rhineland]] (issued on 4 October 1833); ''[[Singulari Nos]]'', on the ideas of [[Hugues Félicité Robert de Lamennais]] (issued on 25 June 1834), and ''[[Commissum divinitus]]'' (17 May 1835) on church and state.<ref>[http://www.papalencyclicals.net/Greg16/g16commi.htm Pope Gregory XVI. ''Commissum divinitus'', May 17, 1835, Papal Encyclicals Online]</ref>