caption: The image shows an engraving of Nicolas Rittershusius, a man with a beard, holding a book in his hand. At the bottom of the image, there is some text which reads "Nicolas Rittershusius, Cunradi Filius". He is wearing a white shirt and a black vest, and has a serious expression on his face. His hair is short and dark, and his eyes are focused intently on the book in front of him.