Project Art Show was announced by Bjo Trimble in the February 24, 1960 issue (no. 53) of Fanac as follows: "A project is starting to form an art exhibit featuring the work of fan-artists from all over at the Pittcon; assistance from artists and interested parties is requested — write to Bjo." This announcement marked the beginning of the modern Worldcon art show, the first of which was at the Pittcon in 1960.
It was originally called "Project Art Show", later in the decade it became "The International Science-Fantasy Art Exhibition" (ISFAE).
Bjo took show on the road to Worldcons and other conventions. Others working on it included John Trimble, Juanita Coulson, who administered the show at Discon when Bjo couldn't attend, and Bruce Pelz, who administered the show at the 1964 Baycon, when Bjo's pregnancy prevented her from attending. By 1969, it had evolved into organization that was involved with judging and awarding prizes, in addition to administration. By this time, Bjo and Bruce Pelz were Directors. Rules for entering, judging, etc. had been codified into a publication, The International Science-Fantasy Art Exhibition Handbook.
By 1968, Bjo's interests had shifted towards Star Trek and in 1969, she relinquished control of ISFAE to an umbrella organization, Con-Fusion, set up by Bruce Pelz, Chuck Crayne, and Ken Rudolph. Con-Fusion was also involved in running the 1969 Westercon and the 1972 Worldcon, and lasted through 1972 before passing from existence.
In later decades, art shows became a rule rather than an exception at science fiction conventions, a showplace for professional artists to display and sell their work and for fan artists to gain renown. All this can be traced back to a good idea Bjo came up with in 1960.