In the project, the Mathildenhöhe exhibition building in Darmstadt is being comprehensively monitored after the completion of renovation measures to improve energy efficiency. The listed building is part of an architecturally unique ensemble that was declared a UNESCO World Heritage Site in 2021. Since its completion in 1908, its halls have been used for changing exhibitions of major contemporary art. After various changes to the building over the decades, it is now undergoing its first ever renovation to make it more energy-efficient. Due to the protection laws for listed buildings and the museum's operation, the requirements are correspondingly high. The building’s energy efficiency is being monitored in order to support the start-up of the technology and enable the innovative renovation concept to be validated.