Gratz Industries (formerly Treitel-Gratz) produces custom furniture, Pilates apparatus, large and small scale sculptures, architectural metalwork, unique displays and signage, lighting fixtures, and exercise equipment. ARCHIVE COLLECTION Gratz Industries is proud to have worked with the following designers, architects, and sculptors: Joseph Pilates, Mies Van der Rohe, Donald Deskey, Raymond Loewy, Marcel Breuer, Isamu Noguchi, Alexander Liberman, I.M. Pei, Richard Meier, Philip Johnson, Massimo Vignelli, Hugh Hardy, Donald Judd, Walter De Maria, Forrest Myers, Nicos Zographos, Sol LeWitt, Robert Indiana, Barnett Newman, Liam Gillick, John Portman, Maya Lin, Dakota Jackson, Robert Rauschenberg, Santiago Calatrava, Deborah Berke, Diane Lewis, William Katavolos, Ross Littell and Douglas Kelly. PILATES COLLECTION Gratz Industries is the original manufacturer of Pilates apparatus and the industry's established source for authentic equipment. Our legacy of high end fabrication and tradition continued with Frank's son Donald Gratz who applied his engineering and metalworking expertise working closely with Romana Kryzanowska in the late 1960's. This collaboration with Romana resulted in the preservation of the dimensions and proportions critical to the correct functions of the Pilates apparatus. Thanks to this relationship Gratz maintained a fidelity to Joseph Pilates original vision by fabricating apparatus with unerring craftsmanship and exacting specifications which continues today.