In the 17th century, the English physicist Robert Hooke discovered plant cells while examining cork under a microscope. He was the first to refer to the units as cells because their boxy appearance reminded him of monastery cells.
Robert Hooke, the Curator of Experiments for the Royal Society, performed extensive work with microscopes. He is also famous for discovering the law of elasticity, known as Hooke's Law, and for his book Micrographia in which he details his observations while using the microscope. He included in the book remarkably complex and intricate drawings of those observations. In addition, he was Surveyor to the City of London, and he helped to design a number of the landmarks in London.