CULTUREPhotos: Italian Renaissance: Editor’s Letter September 2015W‘s editor-in-chief talks about Milan’s cultural revolution.by Stefano Tonchi08.14.151Stefano Tonchi, with Giorgio Armani, at the designer’s 40th anniversary celebration in May. Courtesy of Armani.2Tree of Life, the centerpiece of Milan Expo 2015. Photo by Ye Pingfan/Xinhua Press/Corbis.3Tom Wesselmann’s Still Life #3, 1962, at the Triennale di Milano. Photo by Jeffrey Sturgers/Estate of Tom Wesselmann/Vaga, NY, NY.4Israel’s pavilion at Milan Expo. Photo by Rich/Splash News/Corbis.5Patrizio Bertelli, Miuccia Prada, Matteo Renzi, and Rem Koolhaas at the opening of the Fondazione Prada. Photo byVittorio Zunino Celotto/Getty Images.6The Koolhaas-designed Prada art complex. Courtesy of the Fondazione Prada.7Braco Dimitrijevic’s Les Hérauts De La Post-Histoire, 1997, at the Triennale. Photo by Nick Zonna/Splash News/Corbis.8The Daniel Libeksind–designed Expo Chinese pavilion. Photo by Andrea Pavan/PhotoFVG/Corbis.