He set up his government in Chuquisaca, where he presided over the change of regime in the entire region. He planned the reorganization of the Mines of Potosi, and a reform at the University of Charcas. He proclaimed the end of native slavery in the Upper Peru, canceling the tutelage and giving them political rights as neighbors, equal to those of the criollos. He prohibited as well the establishment of new convents and parishes, to avoid the common practice that, under the guise of spreading the Christian doctrine, the natives were forced into servitude by religious orders. He authorized free trade and redistributed land expropriated from the former workers of the mills. The decree was published in Spanish, Guarani, Quechua and Aymara; he established several bilingual schools as well. The first anniversary of the May Revolution was celebrated in Tiahuanaco with Indian chiefs, where Castelli paid tribute to the ancient Incas, encouraging people to rise against the Spanish. However, despite the welcome received Castelli was aware that most of the aristocracy supported the auxiliary army out of fear instead of genuine support.