The cooking school papers and photographs include lesson plans, photographs, and documents from cooking courses organized by Nat Hart from 1970 to 1992. Materials document courses taught at Nat Hart's Gourmet Cooking School, a culinary school owned and operated by Nat and Sylvia Hart in Las Vegas, Nevada in the 1980s. Also included are materials from classes taught at Caesars Palace, Caesars Boardwalk Regency, and the Desert Inn.

The Caesars World papers and photographs contain restaurant business plans, correspondence, financial information, design plans, memoranda, and photographs pertaining to Nat Hart’s career as the Vice-President of Food and Beverage for the Caesars World Corporation dating from 1968 to 1990.

Nat Hart's recipes are comprised of food recipe cards, recipe collections, and recipes clipped from print material collected by Hart from 1970 to 1994.

Nat Hart's professional membership papers and photographs contain correspondence, documents, and photographs from his activity in professional organizations from 1976 to 1993. Hart was a member of the National Restaurant Association, the Food and Beverage Directors Association, and Confrerie de la Chaine des Rotisseurs, Las Vegas Chapter.