The current site of the palace has been in use since Roman times, as excavations in the gardens testify. On this hill, the Romans built temples to several deities, from Flora to Quirinus, after whom the hill was named. During the reign of Constantine the last complex of Roman baths was built here, as the statues of the twins Castor and Pollux taming the horses decorating the fountain in the square testify. The Quirinal, being the highest hill in Rome, was much sought after and became a popular location for the Roman patricians, who built luxurious villas there. An example of those are the remains of a villa in the Quirinal gardens, where a mosaic, part of the old floor has been found.