Palazzo Farnese is a Renaissance palace located in the town of Caprarola, in the province of Viterbo, in central Italy. It was commissioned by Cardinal Alessandro Farnese, who later became Pope Paul III, in the mid-16th century as a summer residence for the Farnese family.

The palace was designed by the architect Giacomo Barozzi da Vignola, who had previously worked on the construction of St. Peter's Basilica in Rome. The building is arranged around a large central courtyard, and features a monumental staircase, a chapel, and a number of richly decorated rooms with frescoes by famous artists of the time, such as Taddeo Zuccari and Federico Zuccari. The palace also boasts an impressive collection of ancient Roman sculptures.

The exterior of the palace is characterized by its massive size and imposing appearance, with two large cylindrical towers at either end of the building. The palace's gardens, which were designed by Vignola himself, are also noteworthy, featuring a series of terraces, fountains, and water features.

Today, the Palazzo Farnese is open to the public and is home to the Museo Civico di Caprarola, which showcases a collection of art and artifacts related to the history of the town and the Farnese family. The palace is also used for cultural events and exhibitions throughout the year.