Steps. In 1730, Pope Clement XII organized a contest in which Nicola Salvi initially lost to Alessandro Galilei – but due to the outcry in Rome over a Florentine having won, Salvi was awarded the commission anyway. Work began in 1732. Salvi died in 1751 with his work half finished, but he had made sure a barber's unsightly sign would not spoil the ensemble, hiding it behind a sculpted vase, called by Romans the asso di coppe, the "Ace of Cups", because of its resemblance to a Tarot card. Four different sculptors were hired to complete the fountain's decorations: Pietro Bracci (whose statue of Oceanus sits in the central niche), Filippo della Valle, Giovanni Grossi, and Andrea Bergondi. Giuseppe Pannini (1718-1805), son of Giovanni Paolo Panini, was hired as architect. The Trevi Fountain was finished in 1762 by Pannini, who substituted the present allegories for planned sculptures of Agrippa and Trivia, the Roman virgin. It was officially opened and inaugurated on 22 May by Pope Clement XIII. The majority of the piece is made from Travertine stone, quarried near Tivoli, about east of Rome. Restoration The fountain was refurbished once in 1988 to remove discoloration caused by smog, and again in 1998; the stonework was scrubbed and all cracks and other areas of deterioration were repaired by skilled artisans, and the fountain was equipped with recirculating pumps. In January 2013, it was announced that the Italian fashion company Fendi would sponsor a 20-month, 2.2-million-euro restoration of the fountain; it was to be the most thorough restoration in the fountain's history. Restoration work began in June 2014 and was completed in November 2015. The fountain was reopened with an official ceremony on the evening of 3 November 2015. The restoration included the installation of more than 100 LED lights to improve the nighttime illumination of the fountain. Iconography The backdrop for the fountain is the Palazzo Poli, given a new façade with a giant order of Corinthian pilasters that link the two main storeys. Taming of the waters is the theme of the gigantic scheme that tumbles forward, mixing water and rockwork, and filling the small square. Tritons guide Oceanus's shell chariot, taming hippocamps. In the centre, a robustly-modelled triumphal arch is superimposed on the palazzo façade. The centre niche or exedra framing Oceanus has free-standing columns for maximal light and shade. In the niches flanking Oceanus, Abundance spills water from