Life Cycle Cost Perspective of Retrofitting the Istiqlal Mosque: Demonstrating Long-Term Savings of Green Public BuildingsDiana Kusumastuti, Erni Setyowati, Suzanna R. Sari, Agung Dwiyanto and Bagus MudiantoroE3S Web Conf., 650 (2025) 02056DOI: https://doi.org/10.1051/e3sconf/202565002056