Herz Jesu, Catholic church in Aachen-Mitte, Germany

Herz Jesu is a neo-Romanesque church built from stone blocks (Werkstein) in the Frankenberg quarter of Burtscheid, Aachen. Its west facade was clad with tuff stone in 1977. The interior holds a mosaic above the altar that is the second largest in the Diocese of Aachen, after the one in Aachen Cathedral.

The parish founded a church building association on 23 April 1899 under Oberpfarrer Hubert Emanuel Baurs. Josef Kleesattel designed the church in three construction phases; the foundation stone was laid on 11 November 1908, and Cardinal Anton Fischer consecrated it on 5 June 1910. The planned western extension with two bays and a west tower was never built. It became an independent parish on 9 June 1912.

Locals call the church Frankenberger Dom or Öcher Sacre Coeur. The mosaic above the altar is the second largest in the Diocese of Aachen, after the one in Aachen Cathedral. The parish founded a Catholic young men's association in 1912, a forerunner of DJK Frankenberg Aachen.

The church stands at Michaelsbergstr. 6, at the corner of Viktoriaallee, in the Frankenberg quarter of Burtscheid. The former sacristy now serves as the parish office of St. Gregor von Burtscheid, and the sacristy itself was moved into the surviving Kreuzwegkapelle. Visitors should check the parish's current opening times before coming, since the building is an active parish church.

The mosaic above the altar is the second largest in the Diocese of Aachen, surpassed only by the one in Aachen Cathedral. It was badly damaged in the artillery fire of 21 October 1944, and its partial reconstruction is still pending.