Nakhon Kosa Temple, located near San Phra Kan, showcases a blend of Dvaravati, Lavo, and Ayutthaya art styles. The site features an ancient brick prang from the Lopburi period and a large Vihara built during King Narai's reign. A key highlight is the pointed-arch windows of the Vihara, reflecting Western architectural influence. The temple is named after Chao Phraya Kosa Thibodi Lek, who oversaw its renovation in the past. The area demonstrates the historical layering of different eras within the city of Lopburi.