Si Lom is one of the historic areas of Bangkok, best known for its commercial neighborhood. It is one of the first areas where the earliest modern roads were built in Thailand in the reign of King Mongkut (Rama IV), which is Si Lom Road, Charoen Krung Road, Bamrung Mueang Road and Fueang Nakhon Road. Si Lom Road was initially named "Khwang Road." The road later became known as Si Lom, which literally translates as a windmill, probably from the windmill erected in the area by a Western entrepreneur. Currently, Si Lom is considered an area fully served with conveniences that perfectly meet the needs of the urban lifestyle of Bangkokian. This lively business neighborhood is bustling all day and night as it is abundantly filled with the leading companies suitable for working-age people.