Who created the first photomicrograph?

The first photomicrograph was created by the German physicist and microscopist Johann Heinrich Wilhelm Wiegand in 1857. He used a microscope to capture a photograph of a diatom, a type of microscopic algae. This marked a significant advancement in microscopy, enabling scientists to document and study microscopic organisms in detail. Wiegand's work laid the groundwork for future developments in photomicrography.