The Cephalus complex is situated between Myntgatan, Salviigränd, Västerlånggatan and Storkyrkobrinken. The premises are used by members of the Riksdag and officials from the Riksdag Administration.
The complex has not undergone any major reconstruction work since the 1950s. The need to modernise, among other things, the ventilation system and interior surfaces is therefore great. The renovations should result in more efficient use of the premises, as well as greater security and accessibility, in order to improve support to the work of the Riksdag and members of the Riksdag.