For example , T. Mellon & Sons Bank , founded in 1869 , helped to finance an aluminum reduction company that became Alcoa .
Banks played a key role in Pittsburgh 's development as these industrialists sought massive loans to upgrade plants , integrate industries and fund technological advances .
T. Mellon & Sons Bank , founded in 1869 , helped to finance an aluminum reduction company that became Alcoa .
Banks played a key role in Pittsburgh 's development as these industrialists sought massive loans to upgrade plants , integrate industries and fund technological advances .