In the office, Martin Schneider in the Leibniz Research Centre a portrait of Gottfried Wilhelm Leibniz depends. In the picture he is about fifty years old and wears a lush dark wig. His lips a smile caresses. Leibniz was born in 1646, in the German lands raged the Thirty Years War. Leibniz is a child of the Baroque. And a genius. The eight-year Leibniz learned, for example Wigsen, with reference to the father's library autodidactically the Latin language. At 15, he studied philosophy and law. In the 70 years of his life he was a lawyer, scientist, politician, theologian, philosopher and diplomat. Leibniz left a written work of about 200,000 sheets. Philosophy Professor Martin Schneider:
"These manuscripts have we all, they are in Hanover in Lower Saxony State Library, the way now," Gottfried Wilhelm Leibniz Library "called, archived and made available to us from there."

Many of the original documents in French or in Latin are held currently in the vault of the Leibniz Research Centre. They are on loan from Hannover. Some fonts are on the desk. Double, yellowed sheets, closely described with brown ink. It is a letter to the theologians Arnauld, a famous contemporaries. The font is tiny so fit as much as possible on the sheets. Paper was a precious material about 350 years ago. The watermark of the sheets, a post horn, a deer or a sign that enable today's researchers also classify such writings in time that are not dated. Martin Schneider on the Edition.