[2] The building was also declared a Milwaukee Landmark in 1967, and today is the oldest church associated with the Lutheran Church–Missouri Synod in the city.

[3] Trinity's congregation was founded by German immigrants from Pomerania who began to arrive in Milwaukee in the late 1830s, looking for freedom to practice their traditional Lutheranism without the interference of the Prussian state.

He set up Trinity's parish structure and established admission policies that were a key factor in the dispute that produced the Wisconsin Synod.

[3] The goblet-shaped pulpit is the highlight of the craftsmanship exhibited in the carved woodwork,[4] which was produced by the Wollaeger Brothers woodworking company German architecture of this type is typical of the historic structures found in and around downtown Milwaukee, including parts of the neighboring Pabst Brewery complex.

[3] On May 15, 2018, the church caught on fire while construction work was going on, spurring a four-alarm response from the Milwaukee Fire Department and causing $17 million worth of damage to the structure, including the collapse of the entire roof and the shorter southern steeple.