It is a baroque fountain built in granite. According to legend, the fountain on the left was for witches, the one in the middle was for single women, and the one on the right was for married women.
It dates back to the 16th century and was the convent of the Third Regular Nuns of St. Francis, dedicated to Our Lady of Loreto, and also served as military barracks and hospital, until it became the Mother Church in 1810.