This volume constitutes selected and revised papers presented during the Third International Conference on Trandisciplinary Multispectral Modelling and Cooperation for the Preservation of Cultural Heritage, TMM_CH 2023, held in Athens, Greece, in March 2023. The 17 full papers and 17 short papers presented in ths volume were thoroughly reviewed and selected from 416 submissions. The papers are organized in topical sections on ​scientific innovations in the  diagnosis and preservation of cultural heritage; digital heritage a holistic approach; preservation, reuse and reveal of cultural heritage through sustainable bidding and land management, rural and urban development to recapture the world in crisis through culture.