Depending on context, Christiania can refer to:

• Christiania, capital of Norway – what Oslo was called from 1624 to 1877, named after King Christian IV of Denmark and Norway; subsequently, the city was called Kristiania (q.v.). It wasn't before 1925 the city was named Oslo again. 20 years after their separation with Sweden.
• The Free State of Christiania – a partially self-governing neighborhood in Denmark's capital, Copenhagen

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