 Complete the following phrase:  Again the plaza was cleared with exception of the Parian by proclamation of Charles IV of Spain in December 1789. Then-viceroy Juan Vicente Güemes Pacheco had the plaza 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 