Called "a historical jewel in Medan", the 35-room, 2-storey Tjong A Fie Mansion was built in 1895 on an area of 8000 sq. meter. It is a registered historical landmark as well as a cultural heritage building and museum.

The Mansion has Chinese, Malay and Art Deco influences in its architecture style. The structure was built observing feng-shui principles. The rooms are on four sides of the structures and surround a big open-air courtyard in the middle, signifying the "Well of Heaven".