Linked from
The 24 pages that link to European Central Bank, each with the reason it gives.
EuroRelated: It sets euro-area monetary policy and issues euro banknotes.
EurozoneRelated: It sets interest rates and manages monetary policy for all Eurozone members.
Frankfurt am MainRelated: Its headquarters place euro-area monetary decision-making in the city.
HesseRelated: Its headquarters in Frankfurt give Hesse a central role in European finance.