Sergels torg

Albert Lilienberg was appointed city-planning superintendent in 1927, and a year later he produced the first proposal for a public square on the location in his general plan of 1928. In his proposal he envisioned a square whose north-south oriented axis would line-up with Sveavägen intended to be extended south across the square down to the waterfront with widened Hamngatan and Klarabergsgatan joining in from west and east. After this first proposal, the square is featured on every subsequent city plan produced for the area, with alternations in width and length. Notwithstanding the considerable number of revised proposals produced, surprisingly few were preoccupied by architectonic considerations, instead focusing on optimization of traffic flow.[1]

In the city plan Helldén produced in 1946, the square, still named Sveaplatsen ("Swede Plaza"), was conceived as similar to the present square, but still remained an unarticulated modernistic concept. In this proposal, the square was centred on a rectangular open space furnished with trees, benches, and ponds; a space reached by subways stretching under the surrounding roundabout. During the 1950s, continuously increasing traffic loads made separating pedestrians and car traffic desirable, and several studies produced around 1955 focused on a lower level for pedestrians with cars on street-level with various openings to allow light down to the pedestrians.[1]

The iconic triangular pattern of the pedestrian plaza.
The hexagonal building, a 1990 coffeehouse (sv), was removed in 2004 in favor of a street level entrance to the metro station.

The superellipse-shaped fountain

In 1957, a first official proposal presented a square virtually similar to the present; except that instead of the fountain there was an opening with tall trees and on the western side, where the flight of stairs is today, was a building standing on pillars. The Chamber of Commerce was critical of the concept, concluding pedestrians on a lower level would produce poor business sites, an analysis which would eventually prove correct. Their own proposal the following year, developed together with various authorities, reserved street-level to pedestrians while cars were confined below ground. This counter-proposal was however produced in only two months, which made it easy for opponents to pin-down its weaknesses (mostly a failure to leave enough space for the metro which was being constructed at this time). Nevertheless, Helldén's proposal failed to impress the city as well, and Helldén together with other hand-picked experts was therefore sent on a tour around Europe, including Coventry and London, to find a better solution. In Stuttgart they could conclude that having pedestrians on a lower level required escalators, and in Vienna the pedestrian underpass Opernpassage gave them the inspiration to replace the central open space at Sveaplatsen with a round restaurant with glass walls, an aesthetic device intended to give the square an architectonic dignity.[1]

This newly introduced centre-piece resulted in a proposal for a fountain with a monument above it. For the shape of this fountain, Helldén consulted his friend, the mathematician and artist Piet Hein, who in less than in minute found a curve with a "continuously varying bending" and immediately named it the superellipse.[2] Before presenting his final proposal in 1960, Helldén added the triangular pattern to the pedestrian plaza and the wide stairs on its western side.[1]

A contest for the central monument in 1962 was won by Edvin Öhrström, with the 37 metre tall glass obelisk which was named Kristall - vertikal accent i glas och stål ("Crystal - vertical accent in glass and steel"). The sculpture, finally completed in 1974 and since haunted by technical problems, never was able to deliver the intended visual output and - quoting Hall - "thus adds itself to the many projects within the [reconstruction of central Stockholm] that didn't endure confrontation with reality." The artist favoured by Helldén, Olle Baertling, started to work on a sculpture for the square in 1960 but never was invited to participate in the contest.[1]

Night view of the obelisk and Kulturhuset

South of the square, intentions were to erect two buildings separated by a street leading to Brunkebergstorg, but the old buildings south of the square turned their gables towards the modernist composition of Helldén throughout most of the 1960s. A contest in 1965 for this area included a cultural centre proposed by Pontus Hultén, the legendary founder of Moderna Museet who wished to see his museum relocated from the isolated island Skeppsholmen. The contest was won by architect Peter Celsing and Kulturhuset was eventually inaugurated in 1974. It basically is a single huge concrete wall from which are consoling shallow stories with glassed façades, a structure Hultén lyrically described as a stage which would "exercise a strong attractive force" by exhibiting people and works of art through the glass façade.[1]

However, considering Stockholm's northern location, to give the sun full access to public spaces is top priority, and Kulturhuset has proven a problematic wall which not only shuts the sun off, but also tends to dominate the square with its large volume. Additionally, Sergels torg is dominated by its traffic roundabout and is hard to experience as a single coherent space. Together with the traffic structure at Slussen, built in the 1930s, Sergels torg is thus an attempt with few parallels in the world, to make public art of a traffic junction dominating the central district of a city. Since the mid-1990s, numerous proposals to rebuild the square have been produced, and the debate regarding the square is likely to continue.[1]

Currently (2015) large areas of the place are closed for renovation of the 50 years old structures. There is also preparation for the installation of tram tracks from Hamngatan to Klarabergsgatan.