- architect Toivo Korhonen
- built in 1967
- original facade material plain concrete
- during restoring old facade was clad by Balmoral Red granite from Finland
- old concrete facade was restored before cladding
- restoration was carried out during 1999 - 2000
- owner: Kiinteistö Oy Saturnus
- project management and supervision: Stonecon Oy
- architect: Arkkitehtisuunnittelu Jari Häkkänen Oy
- structural engineering: Stoenecon/Insinööritoimisto Konstru Oy
- stone contractor: Suomen Graniittikeskus Oy
- due to the central and important location of the building minimal changes in appearance were desired
- facade contract covered all works, materials and scaffolds
- due to the shape of the facade design of fixing technology was exceptionally complicated
- location in the heart of Helsinki increased the difficulty of logistic management
- during the project copper platings in the facade were renewed completely
- building was normally in use during the renovation
- during the project the entrance of the building was completely redesigned
- total area of new stone cladding was 1250 m2