Complex sentence: The Odescalchi family, of the minor nobility of Como, were determined entrepreneurs, who in 1619 founded a bank with Benedetto's brother and his three uncles in Genoa, the banking capital of Catholic Europe, which quickly grew into a successful money-lending business.
Split into simpler sentences: The Odescalchi family, of the minor nobility of Como, were determined entrepreneurs. In 1619, they founded a bank with Benedetto's brother and his three uncles in Genoa, the banking capital of Catholic Europe, which quickly grew into a successful money-lending business.