Originally the church was sparingly furnished.
The main nave was not vaulted but covered by a wooden ceiling, repeating in the middle the gable-roof form of the outside roof.
Both side naves had even ceilings, supported by columns with cubic capitals.
The lofts opened through three wide arches into the main nave.

Mural paintings repeated Lombard bands and Romanesque ornaments.
The quire was elaborately decorated with mural paintings typical for the Evangelical churches of the end of the 19th century.
The apsis painting displayed an enthroned Jesus of Nazareth in a mandorla surrounded by angels alternating with palms.
A painting on the tympanum on top of the apsis depicted the Roman Centurion asking Jesus to heal his servant (Gospel of Matthew, 8:5–13).
Stained glass windows of ornamental and figured design in the apsis continued the rich colourfulness of the quire.
All this was destroyed in May 1944.

The new interior of 1959 under a wooden barrel vault is very plain.
Behrmann created a new altar and a new pulpit.
Eva Limberg (Bielefeld) designed the new christening bowl, the candlestick, carried by Apostle figures, and the lectern, depicting the scene of the Roman Centurion and Jesus.
In 1958 August Wagner created new coloured windows above the altar, after the design of the Hermann Kirchberger.
The windows depict the Benedictive Jesus, the Nativity of Jesus, and the Descent of the Holy Spirit (Pentecost).
A surviving element of the original furnishing is a larger than life-sized copied statue of the benedictive Jesus after the famous statue by Bertel Thorvaldsen.
Originally the church was sparingly furnished. The main nave was not vaulted but covered by a wooden ceiling, repeating in the middle the gable-roof form of the outside roof. Both side naves had even ceilings, supported by columns with cubic capitals. The lofts opened through three wide arches into the main nave.
Mural paintings repeated Lombard bands and Romanesque ornaments. The quire was elaborately decorated with mural paintings typical for the Evangelical churches of the end of the 19th century. The apsis painting displayed an enthroned Jesus of Nazareth in a mandorla surrounded by angels alternating with palms. A painting on the tympanum on top of the apsis depicted the Roman Centurion asking Jesus to heal his servant (Gospel of Matthew, 8:5–13). Stained glass windows of ornamental and figured design in the apsis continued the rich colourfulness of the quire. All this was destroyed in May 1944.
The new interior of 1959 under a wooden barrel vault is very plain. Behrmann created a new altar and a new pulpit. Eva Limberg (Bielefeld) designed the new christening bowl, the candlestick, carried by Apostle figures, and the lectern, depicting the scene of the Roman Centurion and Jesus. In 1958 August Wagner created new coloured windows above the altar, after the design of the Hermann Kirchberger. The windows depict the Benedictive Jesus, the Nativity of Jesus, and the Descent of the Holy Spirit (Pentecost). A surviving element of the original furnishing is a larger than life-sized copied statue of the benedictive Jesus after the famous statue by Bertel Thorvaldsen.
Capernaum Church