Oslo Havnelager

This building was erected in the period 1916-20. The construction of Havnelageret was very complicated because the building had to be built on bedrock as a result of its large size. This bedrock lay 20 meters below ground level. The difficult base conditions delayed the construction process, but in 1920, Havnelageret was finally based on the 130 pillars, which laid on 1550 piles in total. When finished, the building was so substantial that the 4th floor of Havnelageret was used as an air-raid shelter during the Second World War.

Cut & paste from Wikipedia.........