A barn in the German municipality of Kressbronn, near Lake Constance, has been turned by Thomas and Christine Steimle into a library and community center. In deference to the building’s history, the project balances past and present. The renovation involves simple, surgical interventions that strike a dialogue with the preexisting: an overhanging pitched roof and a cladding replacing the original facade, composed of a concrete base and vertical louvers forming a timber openwork.