Bartolomeo Ammannati was an Italian sculptor and architect born in 1511 in Florence. He is best known for his work during the Renaissance period, where he contributed significantly to the artistic landscape of his time. Ammannati studied under the famous sculptor Michelangelo, which greatly influenced his style and techniques. Ammannati's notable works include the Fountain of Neptune in Piazza della Signoria and the design of the Palazzo della Cancelleria in Rome. His architectural style often combined elements of Mannerism, characterized by elongated forms and complex compositions, making him a key figure in the transition from the Renaissance to later artistic movements.