What are the 12 social encyclipals of the catholic church? Who sponsored them? When were they sponsored?

Question

What are their themes? and what are there literal and actual meanings?

Answer 1

Encyclicals are official teaching documents of the Popes.

The twelve social encyclicals written by five popes from 1891 to 1991.

Here is a nice article explaining them with links to the actual Encyclicals: http://www.catholiclabor.org/encyclicals/papal-encyclicals.htm

With love in Christ.