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The fountain was moved to a more suitable location in a grouping of fountains. The location  was at the southern end of Piazza Navona. The fountain was altered in 1577 because of the low water pressure which would not allow the water ti rise high enough in the fountain. The pedestal was thus removed to create a shorter fountain. Leonardo Sormani da Sarzana was entrusted with the work. The custom was established around this time to create “drinking fountains for horses” as well as “wash tubs for wash we women”. Between 1582 and 1584 a horse troughs and a cistern were built close to the central fountain. These do not remain today. When Sixtus V succeeded Gregory XIII in 1585, the obelisk was added to the site, inscribed by Pharaoh Seti I, over 33 centuries ago. He described himself, with all modesty, as "Powerful Bull, Giver of Life like the Sun, Magnificent Gold, who raised splendid buildings in Heliopolis and built them more solidly than the four pillars of heaven", if the hieroglyphics were interpreted correctly. The obelisk was found in three parts, in the Circus Maximusm, where Augustus had previously had it erected.

Domenico Fontana:
Domenico Fontana, the right hand in the building and demolishing of Rome, was responsible for the re-erecting of the great obelisk. He put the obelisk back together and had it raised where it was desired, as he had done with other obelisks in St. Peter’s Square and St. John Lataran. It was set on a high plinth beside the fountain. It was not set immediately onto the base but instead on four wedges of bronze. As a result, the overall height of the piece was almost 120 feet tall. As with the other obelisks that were raised, Pope Sixtus V chose to "sanctify those stones which in the past had been instruments of a superstitious religion and merely a sign of profane pomp for those who professed Paganism". He had them exorcized and added a cross on top of the fountain. Remarkably very few Romans know this, and Fontana was the one who recorded, "and having expurgated and purged it of the profanity of the Heathens, Your Beatitude [Sixtus V] granted the same indulgence of fifteen years as at the others [spires]... to passers-by who worship and pray there". The next issue would be the risk to the fountain located there.