Many Italian churches are dedicated to the Mother of God Mary and thus have a "SANTA MARIA" (sometimes increased to "SANTISSIMA") in their name. This church in Staletti has the addition "IMMACOLATA", so it is dedicated to the "Immaculate Conception" of the Mother of God.
This term, which today may sound a bit theoretical and difficult to understand, is intended to say that the Mother of God was freed from the beginning by the grace of God from the burden of original sin - which otherwise every human being carries within themselves. This meant that when the archangel later announced to her in Nazareth that she would give birth to the Son of God, she was willing to answer YES of her own free will.
In 1854, Pope Pius IX elevated this article of faith to dogma. The feast for this occasion – and at the same time the patron saint of this church – which in the Catholic liturgy is called “Solemnity of the Immaculate Conception of the Blessed Virgin Mary” is celebrated annually on December 8th.