The little church, with an image of Mary's
Pietà with
Jesus taken down from the Cross, is located above the town waterworks at the same level as the second turn in the road leading to the top of
Mount Bonifato. According to tradition, there was a thief living as a
penitent in that place who nurtured
veneration for the image. In a letter sent to Don Tommaso Papa in 1931, Francesco Maria Mirabella wrote that the legend of the Good Thief was an invention of Liborio Dia, a poet from
Alcamo, and that "Tribonu" is an alteration of "Tribona" in the dialect of Alcamo. "Tribona" is a niche surmounting an altar or an
aedicula. Professor Carlo Cataldo discovered that the word "Tribona" has been in use since at least the 17th century, as a deed dated 1674 mentions an enclosure on the mountain which was called "la Tribona", where there were trees such as sumac and other plants. It is mentioned in other documents dated 1723, 1810, and 1928. == Tradition ==