In the years 1973 to 1983 Hans Urs von Balthasar wrote Theodramatik, a theological work without comparison. By resorting to the language and terminology of theatre, he demonstrates the dramatic encounter of the infinite divine and the finite human freedom. The doctoral thesis focusses on the question of the church in this theodramatic occurrence. It soon becomes clear that the church appears as a person. This is why the thesis first demonstrates, what Balthasar understands by the term “person”. The notion of mission is hereby central. As the church has a mission as well, the church is to be seen as a person. Balthasar describes this being a person via the relationship between the church and Christ. He puts the connection and opposition between the church and Christ at the forefront, by employing the metaphors of body and bride of Christ. The church has a share in Christs universal mission and his universal person in her connection to Christ. As Christs counterpart, the church becomes concrete and appears in a kind of independency. One can derive a dramatic suspense from the coincidence of connection and opposition. Mary also exists in such a suspense. This is why Mary becomes the archetype of the church for Balthasar. He expresses this through the marian principle. Besides the Marian principle (comprehensive, catholic), the church also appears in her Petrine (office) and Johannine principle (aligning). This also leads to suspense. The suspense demonstrates the immense dramatic, in which the church exists. Conclusion and outlook of the thesis are the consequences that can be drawn from the ecclesiology of Theodramatik for our reality.