This article discusses the landscape of strengthening the cultural identity and ethnicity of the Minang people in the overseas land through the Harakatul Jannah Mosque in Gadog, Ciawi, Bogor. In addition to being a symbol of Minangkabau cultural acculturation, this mosque is a trail of social and religious institutions of my Minangkabau custom in the realm of the seaside. This study uses a qualitative method. Data collection is done not only through literature review but also through direct observation. This data analysis technique is based on heuristic, verification, interpretation, and historiography techniques. Based on research conducted, it was found that through the mosque Harakatul Jannah Mosque, the nomads from Minangkabau enlivened the Minang tradition in social activities, education, and diversity well as in the form of building architecture. Combining European and Middle Eastern styles with traditional styles, the mosque was constructed without losing the Minangkabau cultural character reflected in several mosque elements, such as the Bundo Kanduang Gate, the Hajjah Tower, and the Majlis of Shaykh Ahmad Khatib al-Minangkabawi. This is a manifestation of archipelago culture in architecture. While in the field of education, the activities of the students and the community in general in the mosque showed similarities to the Islamic intellectual tradition in the 19th century Minangkabau. All educational and religious activities in the mosque are a form of strengthening the Minang cultural identity in overseas lands.