Ban Pak Baeng and Ban Na Luk, located in Wang Saphung District, are just 4 kilometers apart, with Ban Na Luk to the north and Ban Pak Baeng to the south. Both villages are ancient settlements along the banks of the Loei River, and today they are part of Wang Saphung municipality. The stone markers, known as "bai sema," were first discovered in Ban Pak Baeng at the end of 1965. These markers are adorned with intricate lotus designs on their bases, featuring a central stupa-like structure. The upper part is cone-shaped, resembling the pinnacle of stupas commonly found in the northeastern region of Thailand. In Ban Na Luk, the stone markers are presented as two paired units, resembling stupas but lacking any decorative patterns. In 1976, the National Museum of Khon Kaen preserved one of these markers, leaving only one original marker at its original location. The collection of stone markers found throughout the northeastern region reflects the unique cultural characteristics of the area since ancient times. The artifacts discovered here, some dating back to prehistoric periods, primarily showcase the artistic styles of the Dvaravati and Lopburi eras.