Nordea Bank Abp, commonly referred to as Nordea, is a European financial services group operating in northern Europe and based in Helsinki, Finland.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).