The Mariamman Temple, located in District 1 of Ho Chi Minh City (formerly Saigon), Vietnam, stands as a vibrant testament to the presence and cultural contributions of the Tamil community in Southeast Asia. Dedicated to Goddess Mariamman, a widely worshipped South Indian deity associated with rain, fertility, and protection from diseases like smallpox, the temple was built in the late 19th or early 20th century. Its construction was primarily funded and managed by Tamil traders, particularly from the Chettiar community, who migrated to Saigon during the French colonial period seeking economic opportunities. These communities established numerous cultural and religious institutions across Southeast Asia to maintain their traditions. Architecturally, the Mariamman Temple closely follows the typical South Indian Dravidian style, albeit on a smaller scale compared to temples in Tamil Nadu. It features a colorful gopuram (gateway tower) at the entrance, adorned with numerous stucco figures of Hindu deities and mythological beings. Inside, there is a main mandapam (hall) leading to the garbhagriha (sanctum sanctorum) housing the main idol of Goddess Mariamman, flanked by her guardians. Shrines dedicated to other deities like Ganesha and Murugan are also present. Throughout the French colonial period, the Vietnam War, and subsequent political changes, the temple has served as a vital religious and community center for people of Indian origin in Saigon/Ho Chi Minh City. Interestingly, over time, it has also gained popularity among ethnic Vietnamese and Sino-Vietnamese populations, who are drawn to its vibrant atmosphere, colorful architecture, and the perceived efficacy of the Goddess in granting boons and protection. Its history is thus interwoven with the narrative of Indian diaspora, colonial trade networks, and cross-cultural religious interactions in Vietnam.