Forchhammer grew up in an anarchist community in the center of Copenhagen called Freetown Christiania. Lukas grew up in a self-governing artistic community in the middle of Copenhagen called Christiania. Some intentional communities are also micronations, such as Freetown Christiania. Grieg himself was unable to be there due to conducting commitments in Christiania (now Oslo). On 30 June the emissaries arrived in Christiania, where they turned down Christian Frederik's hospitality. The flag of Christiania originates from the military standard of the Roman emperor Constantine. Ibsen returned to Christiania in 1858 to become the creative director of the Christiania Theatre. Simultaneously, the post of first minister in Christiania was upgraded to Prime Minister of Norway. The state has now full right of disposal of the Christiania area. There are very few entrances to Christiania. In all, over 50 activists from both Christiania and outside were arrested. The center-right government took a number of steps to enforce the law in Christiania. Kim Larsen joined them after reading an ad which was put up at Christiania. Within Christiania itself no private cars are allowed. The population of Christiania reached 40,000 in 1855.