Accounting for trillions in assets worldwide, the banking system is a crucial component of the global economy. While money-changing and money-lending may be as old as money, banking dates back to 15th century medieval Italy, and played a major role in the rise of the Italian city-states as world economic powers.
Ever since, the health of an economy and the health of its banks have been interrelated; the global credit crisis, precipitated by the collapse of the subprime-fueled U.S. housing bubble, is only the most recent example.