‘Sotdae' [솟대] is a long pole designed and built in traditional Korean style. It is commonly accepted that the Sotdae is from Sodo in Samhan Era, which dates from the beginning of the Christian era to approximately 300 A.D. Customs and practices relating to Sotdae continue to be found in modern times. Following Kevin Lynch's theory pointing out the importance of a landmark as a significant component of a city, I tried to reestablish Sotdae's traditional meaning in present day. I think that it is possible to restore the authenticity of Seoul City so that each segment of the city can communicate with better greater flexibility. A visual bond within the city is the first barometer which offers a sense of unity to the citizens. It is also of significant value for an artificial object to possess an absolute visible presence in the particular urban space. Lynch describes obvious visual exposure as the distinctive feature of a landmark. The landmark, as an object that is visually satisfying, also provides a sense of association or a common ideology for the citizens. For example, it is the connected issue of numerous cross signs in the Seoul skyline, which defines the city's identity visually. Setting up the presence of landmarks in an urban space is to establish the city's identity with visual bonds and to restore the communication structure of its citizens. Therefore the city's landmark will provide a means to strengthen the city's identity by supplying certain dynamics to the city in general and thus influence a sense of individual dimension. Studying the city's landmark topologically is to understand the representation of the topological cosmology and thus to comprehend the restoration of the authenticity of Seoul City.