Renee Mertz December 26, 2018 Past and present side-by-side in Vienna Renee Mertz December 26, 2018 Projection in Maria-Theresien-Platz. Photo by Renée DeVoe Mertz. Ai Weiwei installation at the Belvedere. Photo by Renée DeVoe Mertz. Ai Weiwei installation at the Belvedere. Photo by Renée DeVoe Mertz. Installation in the Belvedere, Vienna. Photo by Renée DeVoe Mertz.