Question: Was Sammy's Pizza or Regina Pizzeria founded first?

Context articles: Fox's Pizza Den
Regina Symphony Orchestra
Rabbe Grönblom
Gennaro Lombardi
Pizza Haven (United States)
Uno Pizzeria &amp; Grill
California-style pizza
Papa's Tomato Pies
Sammy's Pizza
Regina Pizzeria

Fox's Pizza Den is a pizzeria chain based in Murrysville, Pennsylvania, United States.
 It was founded in 1971 by Jim Fox in Pitcairn, Pennsylvania, and currently has more than 250 locations in 28 U.S. states, all franchise-owned.
 Fox's Pizza Den has consistently ranked among the Top 25 pizza chains in the world.
 The Small Business Administration named Jim Fox as one of the country's top entrepreneurs during National Small Business Week, May 5–11, 2002.
 Since that time, many Fox's Franchises have closed due to a poor business model.
 The alarming rate of failure lead to the SBA discontinuing the lending of money for Fox's Franchises.
 Fox's Pizza was ranked "Best Pizza Franchise" in 2007.
The Regina Symphony Orchestra (RSO) was founded by Frank Laubach, in Regina, Saskatchewan, as the "Regina Orchestral Society" in 1908, giving its inaugural concert December 3 of that same year.
 Becoming the "Regina Choral and Orchestral Society" in 1919, and merging briefly with the Regina Male Voice Choir as the "Regina Philharmonic Association" in 1924, it returned to independent status as the "Regina Symphony" in 1926, presenting its first regular season (1927–1928) under W. Knight Wilson.
Rabbe Anders Grönblom (May 3, 1950 Helsinki, Finland – June 29, 2015) was a Finland-Swedish businessman who started a successful pizza business in Vaasa, Finland.
 His first company—a pizzeria—was called "O sole mio" and it was founded in 1976 in the center of Vaasa.
 From there he expanded to a pizza franchise chain first called "Pizzeria N:o 1".
 He was known as the "Pizza-emperor" (Pizzakeisari in Finnish), because he was the founder of a well known pizza franchise chain called Kotipizza which was the new name of "Pizzeria N:o 1" which expanded fast outside of Vaasa.
 The chain is said to be the biggest one in the Nordic countries.
 He was also the founder of a shipping company called RG Line, a hotel chain called Omenahotelli and another pizza chain called Golden Rax Pizzabuffet.
 Most of his companies are subsidiaries of Grönblom International LTD, where Rabbe Grönblom acted as director.
 Golden Rax Pizzabuffet however is nowadays a part of Finland's largest hotel & restaurant company Restel Oy Ltd, where Rabbe Grönblom sat on the board.
 He was also on the board of the Finnish tyre company Nokian Renkaat (since 2003).
Gennaro Lombardi was an Italian immigrant who moved to the United States in 1897, and known for opening the first pizzeria in the United States, Lombardi's.
 He opened a small grocery store in New York City's Little Italy.
 An employee of his, Antonio Totonno Pero, also an Italian immigrant, began making pizza for the store to sell.
 Their pizza became so popular that Lombardi opened the first US pizzeria in 1905, naming it simply Lombardi's.
Pizza Haven was an American Seattle-based pizzeria and pizza delivery chain, known as dial-a-pizza, founded in 1958 and opening its first location in the University District, Seattle near the University of Washington.
 Pizza Haven was one of the first pizza companies to make deliveries.
 Restaurant employees used radio phones to relay orders to roving drivers who carried stacks of pizzas in warming ovens in the back of their jeeps and pickup trucks.
Uno Pizzeria & Grill (formerly Pizzeria Uno and Uno Chicago Grill), or more informally as Unos, is a franchised pizzeria restaurant chain under the parent company Uno Restaurant Holdings Corporation.
 Uno Pizzeria and Grill is best known for its Chicago-style deep dish pizza.
 Ike Sewell opened the first Pizzeria Uno in 1943.
California-style pizza (also known as California pizza or Gourmet pizza) is a style of single-serving pizza that combines New York and Italian thin crust with toppings from the California cuisine cooking style.
 Its invention is generally attributed to chef Ed LaDou, and Chez Panisse, in Berkeley, California.
 Wolfgang Puck, after meeting LaDou, popularized the style of pizza in the rest of the country.
 It is served in a number of California Cuisine restaurants.
 Such restaurant chains as California Pizza Kitchen, Extreme Pizza, and Sammy's Woodfired Pizza are three major pizza franchises associated with California-style pizza.
 Nancy Silverton's Pizzeria Mozza is also a popular California-style pizza restaurant in Los Angeles.
Papa's Tomato Pies is a historic pizzeria selling tomato pies in New Jersey.
 It was founded by Giuseppe "Joe" Papa in 1912 on South Clinton Avenue in Trenton, New Jersey.
 Papa's is the oldest family owned and longest continuously operating pizzeria in the United States.
 Papa's is the second oldest pizzeria in the United States after Lombardi's Pizza, however Lombardi's closed for a decade from 1984 to 1994 and was reopened under new management.
Sammy's Pizza & Restaurant is a landmark regional restaurant brand.
 It was founded in 1954 in Hibbing, MN.
Regina Pizzeria, also known as Pizzeria Regina, and originally called Regina Pizza, is a regional pizza chain in New England.
 The company was founded in 1926 by Luigi D'Auria in Boston's North End neighborhood.
 It has been run by the Polcari family since 1956.
 The chain is a part of Boston Restaurant Associates and is headquartered in Lynnfield, Massachusetts.