The Pirámide de Mayo (; ), located at the hub of the Plaza de Mayo, is the oldest national monument in the City of Buenos Aires. Its construction was ordered in 1811 by the Primera Junta to celebrate the first anniversary of the May Revolution. It was renovated in 1856, under the direction of Prilidiano Pueyrredón. In 1912, after having undergone many modifications, it was moved 63 metres (68.9 yards) to the east, with the idea that a much larger monument would eventually be constructed around it. The monument is crowned by an allegory of Liberty, the work of the French sculptor Joseph Dubourdieu. From the ground to the peak of the statue's Phrygian cap, the Pyramid measures 18.76 metres (61.5 feet). Inauguration On April 5, 1811, with the approval of the Buenos Aires Cabildo, it was decided that the program of festivities commemorating the first anniversary of the Revolución de Mayo would include the construction of a pyramid. History does not record why a pyramidal form was chosen for the monument. Some speculate that it was an attempt to emulate the pyramids carved into the pillars of Paris' Porte Saint-Denis, to which the Pirámide de Mayo bears some resemblance. Since 1763 the Plaza de Mayo had been divided by the Vieja Recova (Old Arcade) into two smaller plazas: the one facing the eventual site of the Casa Rosada was known as the Plazoleta del Fuerte, and the one facing the Cabildo was known as the Plaza de la Victoria. The pyramid was situated in the center of the latter. At the insistence of architect Pedro Vicente Cañete and Juan Gaspar Hernández, professor of sculpture at the University of Valladolid, it was decided that the monument would be constructed entirely out of solid materials, including 500 bricks, rather than out of wood, as had been planned originally. On April 6, the cement was poured to form the foundation, amid music and raucous celebration. The monument was inaugurated as planned on National Day, despite the fact that Cañete had failed to meet the schedule and would not complete construction for several days. The pyramid was festooned with the banners of various illustrious regiments who had formed the garrison of Buenos Aires, including the patricians, highlanders, mulattoes and blacks, gunners, hussars, and grenadiers. The Pyramid as well as the Cathedral were heavily illuminated. The Recova was illuminated with 1,141 tallow candles. The