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

Field of yellow flowers in the middle of a forest

Black and white photo of a cheval mirror on a stand

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 portrait of Friedrich Jakob

Plant with green leaves and brown flowers on a white background

Drawing of a waterfall cascading down a rocky cliff

Specimen of a plant with green leaves on a white surface