Why are there Christian communities at Edith-Stein and Thomas Morus residences?

Both residences, the Edith Stein House and Thomas Morus House, are owned by the Archdiocese of Vienna and managed by Akademikerhilfe. The KHG (Catholic University Community) is part of the Archdiocese of Vienna and offers residents of both residences the opportunity to be part of a Christian community.