repaved and the open gutters covered with stone blocks. He also had a fountain installed in each corner. During this work, the Aztec Calendar was unearthed, as well as a statue of the goddess Coatlicue. The Calendar was put on display on the west side of the cathedral, where it remained until about 1890 when it was moved to the old "Centro Museum". It now resides in the Museum of Anthropology. The statue eventually made its way to this museum, but not until it was practically buried in one of the back patios of the Royal and Pontifical University until after Independence. The former merchants of the plaza were moved primarily to a new building called the Mercado de Volador (Market of the Flyer), located southeast of the plaza where the Supreme Court building stands today. The plaza was converted into a public space with 64 lamps. The cathedral was separated from the plaza by iron grating; 124 stone benches were placed and the plaza was marked off by low iron poles connected by an iron chain. The main feature of the redesigned plaza was an equestrian statue of Charles IV by Manuel Tolsá. It was first placed in the southeastern corner of the plaza, first on a gilded wood base to inaugurate it in December 1803. When the monument was finished, the wooden base was replaced by an oval one of stone measuring 113 meters by 95.5 meters, with its own balustrade and fountains at the corners created by José del Mazo. This was the backdrop when Viceroy Don Felix Maria Calleja, other authorities and assembled people swore allegiance to the Constitution of Cadiz, and fealty to the Spanish Crown on 22 May 1813 as the Mexican War of Independence raged. This event also resulted in renaming the square as the "Plaza of the Constitution." The last changes to the plaza before Independence in 1821 were done by Manuel Tolsá placing the Cross of Mañozca at the southeast corner and placing another, similar cross to the northwest. Both of these were set on stone Neoclassical pedestals. Independence and the 1828 Parián Riot A symbolic move upon Independence was the dismantling and removal of the equestrian monument to Charles IV from Plaza. The statue itself can still be seen in front of the National Art Museum where its current, and much smaller, base states that it is preserved solely for