Nordea's roots date to 1820 and Sparekassen for Kjøbenhavn og Omegn in Denmark, and a complete family tree of around 300 banks including some of the oldest banks in the Nordic region. This includes Wermlandsbanken of Sweden (founded 1832), Christiania Kreditkasse of Norway (founded 1848) and Union Bank of Finland (UBF) of Finland (founded 1862). Between 1997 and 2001, the Finnish, Swedish, Danish, and Norwegian banks of Merita Bank, Nordbanken, Unidanmark, and Christiania Bank og Kreditkasse merged into the present day Nordea.