The striking Beyer-Bau complex on the TU Dresden campus needs to be renovated. Due to increased usage requirements, static structural deficits in beams and ceiling planes have to be eliminated, as the existing construction was very slim compared to today's normative specifications. The chosen solution for the strenghthening is a reinforcement of the joists and ceiling planes with carbon reinforced concrete. This solution prevents a demolition and rebuilding of the historic structure. By using carbon reinforced concrete, the existing structures can be reinforced in a minimally invasive and economical manner while complying with preservation orders. The Beyer-Bau project is a very impressive example for a sustainable preservation of a historical building.