Photos from the Celia Rivero Grenfeld Photo Collection (PH-0052) in Special Collections. The Riveros were a pioneering Mexican-American family who settled in Las Vegas in 1917 from Aquascalientes, Mexico. Francisco “Frank” Rivero was the owner of the popular Frank’s Café on South First Street in the 1930s. Read more about the Riveros and other Mexican-Americans in Las Vegas in Mexican Identity in Clark County, Nevada: A Visual Ethnohistory 1829-1960 by Corinne Escobar.