Which of these two pizzerias has had the same owners for longer, Regina Pizzeria or Pietro's Pizza?
Regina Pizzeria: Regina Pizzeria, also known as Pizzeria Regina, and originally called Regina Pizza, is a regional pizza chain in New England. Regina Pizzeria:  It has been run by the Polcari family since 1956. Pietro's Pizza:  Founded in 1957, the chain grew to about 80 restaurants and changed owners several times before shrinking to only four stores.
Regina Pizzeria