A man named Zacharias Janssen made a first compound microscope in the Netherlands.
Anton Van Leewenhoek invented his own microscope and he discovered bacteria by looking at dental scrapings. Instead of calling them bacteria, he called them "Animalcules".
Robert Hooke's microscope included an oil lamp for lighting. A lens focuses light from the flame onto the specimen.
Hooke was looking at a piece of cork through his microscope. He saw cell walls and said they looked like tiny rectangular rooms.
VIrchow discovered that all cells come from cells that already exist.