Obelisk and Fountain of Castor and Pollux

This fountain is in the Piazza Quirnale and is known as the Dioscuri Fountain. It features sculptures of Castor and Pollux as horse tamers. These statues, Roman replicas of Greek originals from the 5th century BC, once stood at the entrance to the baths of Constantine. The 14 metre tall central obelisk once stood at the entrance to the mausoleum of Augustus.
The statues were placed here in 1588 by Pope Sixtus V. The obelisk was added in 1786 and the fountain's granite basin was added in 1818. The basin used an ancient Roman shell that once stood in the Forum where it was used as a trough.