This was one of those syrupy family comedies produced by the same company that gave us "My Three Sons" and "Family Affair". In fact, this had pretty much the same formula as "My Three Sons" except that instead of a single father raising three sons, we had a single father raising three daughters and instead of small town America or a penthouse in New York, the show was set in the exotic city of Rome. And not only that, this was so much a copy of that show, that during the second season the producers decided to bring the girls crusty maternal grandfather (played by Walter Brennan) on the show to play the "Uncle Charley" role. Also, the ratings for this show were so bad that they had to resort to crossover episodes with the two aforementioned shows. No wonder it lasted only two seasons. This pretty much showed that America was getting tired of shows of that ilk and within a year of this show being canceled, the two shows that it pretty much was a carbon copy of were off the air.
