 While the building's present eastern front, today hiding the Supreme Court, is less than extrovert, it did include an entrance to a "public boudoir" during the 18th and most of the 19th century.The alley was, however, entirely closed during the period 1850–1913, to accommodate the prison of the Town Hall, finally demolished in 1929-1930 to give space to Kanslihuset, the offices of the Parliament.In contrast, the voluminous and heavy mass of Kanslihuset on the alley's eastern side, designed by Wolter Gahn and Gustaf Clason and completed in 1936, opens up to the alley in form of the western end of the series of courtyards which pierces the building.