For years now, the Mikael Agricola Church in Helsinki has been packed every Sunday evening at six o’clock. It is the hour for the St. Thomas Mass, celebrated under the name of the apostle who seemed to have more questions than answers in his faith. This Lutheran worship service has been influenced by old liturgical traditions of the church as well as by the spirit of ecumenism. The service takes two hours and it requires a team of seventy to a hundred people, all volunteers. Usually the teams differ from Sunday to Sunday, because each Sunday is a project of its own…