This sign indicates that the yellow colonial-style building is "Ongde's Old House," or the house of Mr. Khamsing Udomdet, located at number 268. Built in 1933 (B.E. 2476), it is now known as "Udomdetchawat Mansion," a significant historical tourist attraction in the old town area of Sakon Nakhon province. It vividly reflects the architecture and stories of Thai people of Vietnamese descent in the past.