Abstract: In 1656 John Wallis developed an infinite product expressing 2/π. The Wallis Product is thought to be the second such infinite product used to express a value of π. The first seems to have been developed in 1592 by Francois Vieta who expressed 2/π as an infinite product of radicals. While Vieta and Wallis' products appear unrelated, they are in fact specific cases of a more general double product. The purpose of this talk is to indicate the derivation of the products of Wallis and Vieta. Time permitting, we will expose the double product that connects these formulas. (There are also connections to Stirling's formula which we discuss at another time.)