However, in this case, the obelisk is surrounded by one of Bernini's masterpieces: Fontana dei Quattro Fiumi. The four figures at each corner of the statue are a personification of the four rivers ...

Bernini’s assistant, Giovanni Antonio Mari, rendered the final version of the figure in marble for one of the fountains, which came to be known as Fontana del Moro, or the Fountain of the Moor.