The Pious Workers of St. Joseph Calasanctius of the Mother of God (Latin: Congregatio pro operariis christianis a Sancto Iosepho Calasantio) are a Roman Catholic clerical religious congregation of Pontifical Right for men founded at Vienna, Austria in 24 November 1889, by Father Anton Maria Schwartz for works of charity, but especially the apostolate among workingmen.
The members of the congregation are both priests and lay brothers who follow the Rule of the Piarists (founded by St. Joseph Calasanctius), modified in some particulars.
The Pious Workers teach Christian doctrine in schools, establish elementary and trade schools, build homes for apprentices and all workmen, open oratories, form associations of working men and promote the diffusion of good literature.
At Vienna, which has been so far the chief scene of their activity, in addition to undertaking the works already mentioned, they have taken charge of the reformatory (1904), have opened a public library and have founded among other associations a Guard of Honour of the Most Blessed Sacrament.
Other fathers of the society have published dramas for presentation by clubs under their charge, a book of recitations, and a number of biographies.