[citation needed] Exceptions include 1902, when the exhibition was a historical overview of well-known works by international artists; 1906, when the show was suspended to accommodate the enlargement of the museum; and a five-year hiatus between 1915 and 1919 due to World War I.
The Carnegie Institute holds the "annual exhibition" for eighteen years, except in 1906, due to museum construction.
Between 1920 and 1950, the Carnegie Institute held nineteen international exhibitions, with a hiatus during the Second World War and rebuilding of Europe.
Saint-Gaudens instituted the display of works by country during these years and introduced the Popular Prize, voted upon by the public, in 1924; he retired after the 1950 show.
Concurrent with the 1958 International and in celebration of the Pittsburgh bicentennial, his assistant director, Leon Arkus, organized a retrospective exhibition including 95 paintings from previous editions.
[citation needed] The 1964 and 1967 Internationals were organized by the Museum's fourth director, Gustave Von Groschwitz, in consultation with seven national correspondents based in Europe, whom he referred to as "informal co-jurors".
This format has remained in place through all of the successive editions, with a twist in 1985, when Lane co-curated the exhibition with John Caldwell.