Robert Hooke first discovered cell and cell wall in 1665 after observing the cellular structure of cork. He also coined the term 'cell' for compartments of honeycomb like structures in a cork.
Robert Brown discovered the presence of nucleus in the centre of a plant cell In 1833.
Camillo Golgi dicovered the Golgi apparatus in 1898.
Andreas Franz Wihelm Schimpe first used term chloroplast for stroma and grana in 1885.
Porter in 1945 discovered and named the structure endoplasmic reticulum.