Use and Reuse of Architectural and Landscape Heritage

What is the relevance of exchanging ideas about the use and reuse of architectural, urban and landscape heritage?
The emergencies that the world and each of our continents are going through today could put that topic on a secondary level for being apparently disconnected from all these serious problems. In reality, however, cultural heritage, as a result of a continuous interaction between expressions of different civilizations over time, is at the heart of many phenomena that we experience today.