The former Immanuel Lutheran Church on Pearce Boulevard is a fantastic example of the Carpenter Gothic, which I wrote about several years ago at St. Louis Magazine. The congregation was founded by a minister who came from New Melle in 1874.
It is a form of the Gothic Revival, which bends wood carefully and also features board and batten siding techniques.
Immanuel Lutheran has moved over to Route N, and now the church and its old school building is the Pearce Hall alternative high school of the Wentzville School District. The phoenix, which sets itself on fire to be reborn, is the mascot.
There are various wings added on at different times; here is one cornerstone.