The Digital Media City Landmark Building (Korean: 디지털 미디어 시티 랜드마크 빌딩) or DMC Landmark Building, also known as Seoul Lite or Light Tower, was a 133-floor, 640 m (2,100 ft) supertall skyscraper proposed for construction in Digital Media City, Seoul, South Korea.

The building was to house an observation deck on 133rd floor at 540 m (1,772 ft), from which visitors will be able to see the entire metropolis of Seoul and as far as Gaeseong, North Korea.

All functions of a futuristic, 21st century city were to be incorporated into the building, including the most high-tech office and residential spaces, a department store, luxury shopping malls, a large convention center, the world's largest interactive aquarium, international restaurants and facilities for media, culture and exhibitions.

[7] The landmark building was backed by the Seoul Metropolitan Government and was being constructed at the fastest speed among major skyscraper projects by Samsung C&T.

[11] On 16 August 2009, the DMC Landmark Building broke ground with the theme of "light leading the new millennium" and a LED laser performance.

The mayor opened the event by praising that the Digital Media City "will provide the world with an entire community to use as a living laboratory of tomorrow's lifestyle.

It will be set in an area of riverside parkland encompassing ecological gardens, lakes, hills and streams - providing heartening evidence that 21st century urban man can co-habit with nature, to the mutual benefit of both.

The installation of automatic ventilation windows on the surface of the building will aid the supply of fresh air and save considerable energy.

On 1 July 2009, the mayor of Seoul signed an investment agreement with United States-based Acrylic Tank Manufacturing (ATM) to build the aquarium.