what was the Italian restaurant on the southwest corner of 19th & Leavenworth?
I think you are probably thinking of Cantoni's Restaurant, at 1901 Leavenworth. Louis Cantoni, an Italian immigrant, opened it in 1917. When he retired in 1963, he sold his interest to his partner, John Marcello. The restaurant declared bankruptcy and closed in 1982.
I hope this helps!