How did the Medici family rise to power in Florence? Answer in a complete sentence.

The Medici family came to power with the creation of the Bank of Medici, the biggest bank during the XV century, they also axquired a lot of economic power with this new bank. They had a great influence on the Renaissance. Giovanni de Medici started the Medici bank. His son, Cosimo de Medici became the leader of Florence in 1434. The Medici family ruled Florence until 1737.