Plant with green leaves and brown flowers on a white background

Group of children standing in front of a crowd of people

Piece of paper with a drawing of a sphere on it

Black and white engraving of a man with a beard wearing a hat

Black and white portrait of Friedrich Jakob

Drawing of a waterfall cascading down a rocky cliff

Specimen of a plant with green leaves on a white surface

Engraving of a man in a suit and tie standing next to a table with a…

Black and white engraving of a man with a crown on his head