Friedenskirche, Lutheran church in Jena, Germany

Friedenskirche is a religious building in central Jena displaying architectural features of the Baroque period from the late 17th century. The structure stands out for its solid masonry and traditional church layout with choir and nave sections.

Built 1686–1693 as the Johann-Georgs-Kirche, named after Duke Johann Georg II of Saxony-Eisenach, it served as the new cemetery church on the Johannisfriedhof. Johann Heinrich Gengenbach directed the work with Johann Leonhard Reinhold, while Johann Mützel led construction until 1691; consecration followed on 16 July 1693. In 1743 it was assigned to Jena's garrison congregation and long called Garnisonskirche, until its renaming as Friedenskirche in 1946.

The church was originally named Johann-Georgs-Kirche after Duke Johann Georg II of Saxony-Eisenach, and was renamed Friedenskirche in 1946. Since 1743 it served the Jena garrison congregation, which is why it was long called Garnisonskirche. Inside are 13 epitaphs from the late 17th and early 18th centuries, including the Tannenberger family epitaphs in the choir with paintings of Christ's entombment and resurrection.

The church stands at the corner of Humboldtstraße and Philosophenweg, on the left bank of the Saale. The south portal is walled up, so entry is through the north portal, whose relief of 1743 shows the monogram of Duke Ernst August. The interior is open during parish use; the parish belongs to the Jena church district.

The north portal carries a 1743 relief with a cartouche bearing Duke Ernst August's monogram and trophies, added when the church passed to the Jena garrison. Inside, the 1835 pulpit altar was later renewed in plain form, and the choir windows were made by Fritz Körner after 1945.