Later, Phra Ratchasilasophit, widely known as Luang Pu Nu In Kittisaro, a highly respected Vipassana meditation master of northeastern Thailand, played a major role in developing the temple. Under his guidance, the temple expanded both its religious structures and Dharma activities, becoming one of the province’s important meditation centers. Luang Pu Nu In was revered nationwide, attracting devotees and practitioners from across Thailand.The temple’s most remarkable structure is the “Phra Maha Mondop Mongkhon Yot Kaeo,” a magnificent Thai-style pavilion specifically built to house Luang Pho Ong Dam. The mondop features intricate Thai architectural details, ornate carvings, and a striking golden spire visible from afar. Inside, visitors can admire beautiful mural paintings depicting scenes from the life of the Buddha, along with finely crafted contemporary Thai Buddhist art reflecting the deep faith of the local community.

Beyond paying homage to Luang Pho Ong Dam, visitors can also explore meditation halls, Dharma practice areas, and religious activities held on important Buddhist holy days such as Makha Bucha, Visakha Bucha, and Buddhist Lent. During these occasions, large numbers of devotees gather to make merit, listen to sermons, meditate, and participate in candlelight processions. This makes the temple not only a religious center, but also a significant cultural and spiritual landmark of Kalasin Province. Today, Wat Pa Phutthamongkhon stands as more than just a place of worship. It is a symbol of northeastern Thai Buddhist heritage, combining sacred faith, traditional artistry, and the peaceful charm of a forest temple. Travelers visiting Kalasin often come to pay respects to Luang Pho Ong Dam, admire the grandeur of the mondop, and experience the serene atmosphere that continues to define this revered temple.