European Central Bank Ostend (East End), Frankfurt am Main. The city is the largest financial centre in the Eurozone and the bank's location in it is fixed by the Amsterdam Treaty. The bank moved to new purpose-built headquarters in 2014 that were designed by a Vienna-based architectural office, Coop Himmelbau. The building is approximately tall and will be accompanied with other secondary buildings on a landscaped site on the site of the former wholesale market in the eastern part of Frankfurt am Main. The main construction began in October 2008, and it was expected that the building will become an architectural symbol for
European Central Bank to reach about €2,500 billons and is currently expected to last until at least end of 2018. The principal monetary policy tool of the European central bank is collateralised borrowing or repo agreements. These tools are also used by the United States Federal Reserve Bank, but the Fed does more direct purchasing of financial assets than its European counterpart. The collateral used by the ECB is typically high quality public and private sector debt. The criteria for determining "high quality" for public debt have been preconditions for membership in the European Union: total debt must not be too large in