The church is built in the English Tudor style and impresses with its two minaret-like towers on the west facade and its tall windows, which together with the stencil painting inside the church, convey a bright and friendly overall impression. Inside the castle church, the furnishings from the founding period are still present, including the Böttcher organ and the altarpiece with the motif of Christ praying in the Garden of Gethsemane. The altarpiece and the organ were donated by Queen Elisabeth, the wife of Friedrich Wilhelm IV, who, like her husband, was very fond of Letzlingen.