The fountain of Dea Roma decorates the facade of Palazzo Senatorio. The only element of the palace by Michelangelo consists of the monumental stairway that leads to the Senatorial Room, built between 1547 and 1554. The external facade is decorated with a very high central niche with pairs of supporting pilasters on its sides. In the original project the niche was supposed to be occupied by a Juppiter that was then replaced with a huge standing statue of Minerva that had been placed at the time of Paul the Third Farnese. Matteo di Bartolo from Città di Castello was assigned the task of building a fountain in 1588, after the Acqua Felice was brought to the Capitol Hill.