Luther Garden architect Andreas Kipar, right, explains the elements of the art installation, Heavenly Cross, moments before it is unveiled. Looking on are LWF General Secretary Martin Junge, left, German President Joachim Gauck, LWF President Bishop Dr Munib A. Younan and General Secretary of the German National Committee of the LWF, Norbert Denecke, during the unveiling of the Heavenly Cross in the Luther Garden in Wittenberg, Germany. Photo: LWF/Marko Schoeneberg