9th Street Art Exhibition
The 9th Street Art Exhibition of Paintings and Sculpture is the official title artist Franz Kline hand-lettered onto the poster he designed for the Ninth Street Show (May 21-June 10, 1951). Now considered historic, the artist-led exhibition marked the formal debut of Abstract Expressionism, and the first American art movement with international influence.
Source: Wikipedia — 9th Street Art Exhibition (CC BY-SA 4.0)