German to English Social Sciences History religious instutions

"... erkläre ich mich gern bereit, die Leitung der von Ew. pp. in Köthen zu errichtenden Kommunikantenanstalt durch Schwestern unserer Genossenschaft zu übernehmen." Source is a letter from 1870 written by the Mother Superior of a Catholic order. I have learned that a Kommunikantenanstalt has something to do with the education of children and was often associated with an orphanage, but do not know how to translate the term. Is it, perhaps, a boarding school?