Black and white photo of a forklift parked next to a train on a…

Painting of a man with a beard wearing a black dress and a black hat

Man in a suit and tie sitting at a table with a bottle of water

Black and white drawing of a maze with intricate patterns and numbers…

Drawing of a bridge over a river with a boat in the foreground

Structure of a peptide molecule with a red arrow pointing to the left…

Black and white drawing of a crown on a white background

Drawing of a door with a door handle and a door lock

Flag of Bulgaria