In this paper, the authors would like to review a selection of historic houses that have been renovated in the past 25 years and in which the climate has been optimized. The observations are intended as a general overview made from a governmental perspective. The paper provides general descriptions of a selection of projects in which the agency has been involved. With this paper the authors hope to inspire the reader by presenting the decision-making process and the lessons learned for these case studies against the backdrop of climate change. Are the solutions that were chosen sustainable, and are the museums now more resilient to climate change?