Officials say Barbra Streisand will serve as board chair of a planned performing arts center at the World Trade Center. The announcement was made Thursday at a design-unveiling for the long-stalled project. The center will be shaped like a cube and made out of translucent marble. It will have three theaters with moveable walls that could be reconfigured for works of dance, opera, music and theater. It also will be home to the Tribeca Film Festival. The center will be called the Ronald O. Perelman Performing Arts Center and is scheduled to open in early 2020. The billionaire businessman donated $75 million for the $250 million project in June. It has undergone numerous changes and delays since it was first included as part of the site's 2003 master plan.