Hungarian President Janos Ader, left, German First Lady Daniela Schadt, Polish President Bronislaw Komorowski, German President Joachim Gauck and Leipzig Mayor Burkhard Jung join in the celebrations in Leipzig. (Sean Gallup / Getty Images)
Colorfully painted pieces of the former Berlin Wall are on display on the New West Berlin arts zone in Berlin. (Joerg Carstensen / EPA)
Art carries messages on slabs of cement that were once part of the Berlin Wall. (Joerg Carstensen / EPA)