From vico i Merello enters the vast area called "Orto dei Cappuccini". From 1595, the Capuchin brothers established their first monastery, Sardinia, on the hill to the west of the amphitheater, endowing a vast land used as a botanical garden, and incorporating some ancient reservoirs into their lands. The monastery grew so fast, that in 1649, it included up to 65 monastic cells, as well as kitchens and the rapid development of the monastery, with a wool mill, a dispensary and an extensive vegetable garden for cultivation. Everything is in the presence of a well in which rainwater flows, thanks to the complex work of water channels. Capuchin's father, Giorgio Alio, author of Sardinia's Chronological History, talks about a plague in Cagliari in 1656, possibly related to the Orto di Capaccini cistern. Aleo actually wrote that in the last days of May 1656, the deaths in Cagliari became so high, that there was not enough "fossori" to bury the dead. Faced with the growing number of unpopulated bodies, the health judge decided to "bury" the dead in wells and cisterns: the dead of the Castillo area "ended in an old cistern near Capuchin."