Frenn has exhibited widely[1] in the United States, Europe, the Middle East,[2][9] and his work has been widely reviewed by major newspapers[4][5] and significant art critics.[11][10] His work has been exhibited at the Hoyt Institute of Fine Arts in New Castle, PA,[1] Housatonic Museum of Art[12] in Bridgeport, CT, Erie Art Museum in Erie, PA,[1] Arnot Art Museum in Elmira, NY,[1] and the Sursock Museum[13] in Beirut, Lebanon. Frenn's paintings are also in the permanent collection of The Housatonic Museum of Art in Bridgeport, CT[14] and the Springfield Museum of Art in Springfield, OH.[15]