Trost & Trost Architects & Engineers, often known as Trost & Trost, was an architecture firm based in El Paso, Texas. The firm's chief designer was Henry Charles Trost, who was born in Toledo, Ohio, in 1860. Trost moved from Chicago to Tucson, Arizona, in 1899 and to El Paso in 1903. He partnered with Robert Rust until Rust died in 1905.That year he formed the firm of Trost & Trost with his brother Gustavus Adolphus Trost, an architect.