stiania expanded its industry from 1840, most importantly around Akerselva. The expansion prompted the authorities to construct several important buildings, most of which remain as tourist attractions. There was a brief building boom from 1880, with many new houses, but the boom collapsed in 1889.
1900�present
Auctioning off of children was prohibited by law (Fattigloven) in 1900, as a result of court cases related to children having died/been killed.
The kommune developed new areas such as Ullev�l Hageby (1918�1926) and Torshov (1917�1925). City Hall was constructed in the former slum area of Vika, from 1931�1950. The municipality of Aker was incorporated into Oslo in 1948, and suburbs were developed, such as Lambertseter (from 1951). Aker Brygge was constructed on the site of the former shipyard Akers Mekaniske Verksted, from 1982�1998.
On 22 July 2011, Oslo was hit by a bomb blast that ripped through the city central government district, also damaging Prime Minister Jens Stoltenberg's office while he was absent and the nearby Ministry of Petroleum. The terrorist blast killed at least eight people prior to a shooting spree on the island of Ut�ya on lake Tyrifjorden, which killed 69 youths participating in a Norwegian Labour Party youth camp. The culprit is Anders Behring Breivik
