LO castle, Office building in Stockholm, Sweden.
LO Castle is an office building on the waterfront in Stockholm, serving as the headquarters of the Swedish Trade Union Confederation, known as LO. Built after World War II, it features large windows that face the water and open interior spaces designed to host meetings and daily union work.
The building was constructed in the mid-20th century, when the Swedish labor movement was at its peak and needed a permanent base in the capital. Placing it on Stockholm's waterfront was a deliberate choice that put the union confederation at the center of the city.
The nickname "LO Castle" came from Stockholm residents who felt the building looked like a fortress rising from the water. People passing by often see groups arriving for meetings, giving the place the feeling of a gathering point for working life in Sweden.
The building is easy to reach from central Stockholm, as it sits close to several public transport stops along the waterfront. Because it is an active office, public access is limited to certain areas, so it is worth checking ahead before visiting.
Although the building has an official, plain name, the nickname LO Castle became so widely used by Stockholmers that it appears on maps and in city guides. This is rare for a private office building and shows how much the place became part of everyday life in the city.
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