Abstract In the context of global dynamics influenced by climate change and environmental sustainability awareness, the implementation of sustainable architecture becomes an urgent necessity in infrastructure development. Mosques, as centers of spiritual and social activities, play an undeniable role in responding to and facing these challenges. This research focuses on Mosque Istiqlal in Jakarta, a symbol of religious and national significance in Indonesia. Mosque Istiqlal, as a case study, becomes a crucial representation of efforts to integrate principles of sustainable architecture into religious buildings. To comprehensively analyze and understand the implementation of these principles, this research aims to detail how Istiqlal Mosque creates a functional and environmentally friendly built environment. By delving into the design and construction of Istiqlal Mosque, this study employs a qualitative descriptive method, involving document analysis, field observations, and interviews with architects and stakeholders. The research results are expected to provide profound insights into the positive contributions made by the implementation of sustainable architecture in the context of mosques and serve as a foundation for the development of more sustainable mosques in Indonesia in the future. With a focus on Mosque Istiqlal, this research is anticipated to offer valuable guidance for understanding and promoting sustainability in the spiritual and architectural aspects of religious buildings.