Red Door Project to show local artists in bloom at Cincinnati Zoo Earth Day art gallery showcasing sustainability The Cincinnati Zoo and Botanical Garden will host the Red Door Project's latest installment and most recent evolution as an organization on Earth Day. and last updated 2021-04-16 18:26:08-04 CINCINNATI â Seven years ago Barbara Hauser launched the Red Door Project as a pop-up art gallery event in Over-the-Rhine. Hauser would host the Red Door Project in an empty retail space as a way to showcase the neighborhood's potential. "It sort of evolved," Hauser said of the project as it matured. "We started to see new theaters open . . . the Shakespeare Theater, the Ensemble Theater. And so we started moving to their lobbies."