Uno Chicago Grill, formerly known as Pizzeria Uno or more informally as Uno's, is a loosely-
franchised pizzeria restaurant chain credited with creating Chicago-style pizza. The first Uno's
was established in 1943 by former University of Texas football star Ike Sewell in the River North
neighborhood of Chicago, Illinois. Sewell opened a second location (called Pizzeria Due) in the
same area twelve years later to handle overflow from the original restaurant. Today the corporation
is based in Boston, Massachusetts. Ironically, the restaurant chain does not have a major presence
in Chicagoland, with only four locations in the region excluding the original Uno and Due
restaurants downtown.

The company began franchising in 1980[3] As of 2005 the chain has 216 restaurants, with 85
franchises and 128 company-owned restaurants in 32 U.S. states. Three additional franchises are
located in Puerto Rico, South Korea, and the United Arab Emirates.