Lucy, I think the word is 'Corso'...they lived at #56.
For further family research, an important tidbit is Michele's age; 21= B.~1868. I did not view all the other children's birth records, but did take a peek at Antonio Attilio's Nov 1890 which shows Michele's age as 23 (B.~1867)...so am guessing the estimated birth year listed at familysearch's profiles (1860) may be off (I would begin marriage search for Michele + Rosa in 1888->work back vs add 20 years to 1860=1880->work up....
BTW, by 1890 the family was living @ #17 Via Madonna Cristina. Michele's profession appears to be 'decoratore'