Lawang Sewu in 2011
|Town or city||Semarang|
|Owner||PT Kereta Api|
|Design and construction|
|Architecture firm||J.F. Klinkhamer and B.J. Quendag|
The complex consists of several buildings, two main ones named A and B and two smaller ones named C and D, on Pemuda Street. The l-shaped A building faces the Tugu Muda roundabout. There are two identical towers on A building, which were originally used to store water, each with a capacity of 7,000 litres (1,800 US gal). The building features large stained-glass windows and a grand staircase in the center. There was also once an underground tunnel connecting A building to several other sites in the city, including the governor's mansion and the harbour.
The B building is located behind A building. It is three stories in height, with the first two floors consisting of offices and the third holding a ballroom. The building, with high, large windows, also has a basement floor that is kept partially flooded to serve to cool the building through evaporation. 
Lawang Sewu was designed by C. Citroen, from the firm of J.F. Klinkhamer and B.J. Quendag. It was designed in New Indies Style, an academically-accepted term for Dutch Rationalism in the Indies. Similar with Dutch Rationalism, the style is the result of the attempt to develop new solutions to integrate traditional precedents (classicism) with new technological possibilities. It can be described as a transitional style between Traditionalists and the Modernists, and was strongly influenced by the design of Berlage.
Construction began in 1904 with A building, which was completed in 1907. The rest of the complex was finished in 1919. It was initially used by the Nederlandsch Indische Spoorweg Maatschappij, the first railway company in the Dutch East Indies.
After the Japanese invaded Indonesia in 1942, the Japanese army took over Lawang Sewu. The basement of B building was turned into a prison, with several executions taking place there. When Semarang was retaken by the Dutch in the battle of Semarang in October 1945, the Dutch forces used the tunnel leading into A building to sneak into the city. A battle ensued, with numerous Indonesian fighters dying. Five employees working there were also killed.
By 2009 the Lawang Sewu complex was in a state of considerable dilapidation. Simon Marcus Gower, writing in The Jakarta Post, noted it as being "dark and evidently sick. Its white walls are faded throughout; blackened by pollution and neglect. Rendered walls are cracked and any wall paper has long since fallen away to reveal the red bricks beneath. Mould and weeds grow over much of the building and mice and rats are the chief residents."
The building soon underwent renovations to ensure that it would be profitable as a tourist attraction. Governor of Central Java Bibit Waluyo mobilized several dozen soldiers to assist with the renovations; the soldiers focused on external repairs. Local residents were disappointed in the renovations, opining that it had lost its authenticity.
On 5 July 2011 the newly renovated complex was inaugurated by First Lady Ani Yudhoyono. However, at the time only B building was available for tours. It is hoped to be a main attraction in the Central Javan government's tourism program in 2013.
Future plans include transforming Building B into office space, a food court, and even a gym. In late 2013 the Semarang city government announced plans to eliminate the building's "spooky image" in order to attract more visitors. This was to encompass a reimagining of the site as a place for social and cultural activities, supported by renovations of the building. At the time, Lawang Sewu attracted an average of 1,000 visitors daily.
Lawang Sewu is said to be haunted, with many tourists visiting to see the ghosts. Among the ghosts reported to inhabit the establishment are a Dutchwoman who committed suicide inside and "headless ghouls".
In 2007, a horror film entitled Lawang Sewu: Dendam Kuntilanak (Lawang Sewu: Kuntilanak's Vengeance) was released based on the legend. It told the story of a group of high school students from Jakarta who were trapped in Lawang Sewu after several had to urinate and featured ghosts of a Dutchwoman, a man with a ball and chain wrapped around his leg, and a kuntilanak.
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