In the 1950s, the Südstadt parish had already grown to 4,000 members. The St. Mariae-Jakobi parish initially set up a second parish post to look after them. An independent parish was founded in March 1961. The former Union sports ground was acquired as a site for the construction of a community center. The foundation stone was laid on June 6, 1965, and two years later, on July 1, 1967, the church and community center were consecrated.
The hexagonal church building forms the center of the community center, which is surrounded by single-story buildings that house the parish office, the community rooms and the kindergarten. To the west of this, connected to the center by the roof, is the 55-meter-high triangular bell tower, visible from afar. This consists of two long concrete slabs and carries a 6-meter-high stainless steel cross on its top. The four bronze bells hang in the belfry below the center of the tower.
The hexagonal church interior is 13.5 meters high and covered with stainless steel panels. The two entrances are to the left and right of the bell tower. In the vestibule of the church, between the entrances, is the baptistery, which is slightly lower than the rest of the room. The organ, which has 22 stops, is located in the gallery above. Opposite the organ and baptistery is the altar table. The picture wall behind it bears five bronze reliefs by the Hamburg sculptor Fritz Fleer (1921-1997), depicting Noah under the rainbow, the wedding at Cana, Jesus carrying the cross, Jesus at the table with his disciples and the pouring out of the Holy Spirit at Pentecost. The pulpit stands to the right of the altar and, like the altar and the baptismal font, is made of polished concrete.
The room receives its light from three large, triangular window walls, which in turn are divided into colored triangles and framed by a white window band. Both the windows and the baptistery were designed by the graphic artist Claus Wallner (1926-1979). The triangle, which can also be found in the roof and walls and is therefore the main design feature of the church interior, stands for the Trinity of God and thus for the name of the church.
Text: Markus Schulze, Ortsheimatpfleger for Hohenrode