Stefan Hell enters the University Heidelberg to study Physics. He obtains his diploma in 1987.

Stefan Hell works at the European Molecular Biology Laboratory in Heidelberg. He continous his work and demonstrates the principles of 4-Pi microscopy.

Stefan Hell joins the University Turku, Finland and works as a group leader on the development of the principles for stimulated emission depletion STED microscopy.

Stefan Hell becomes the leader of a junior group of the Max-Planck Institute for Biophysical Chemistry. The groups is dedicated to sub-diffraction-resolution microscopy.

Stefan Hell attends the Nikolaus-Lenau-Lyzeums in Timisoara before his family moves to Germany. There he attends the Carl-Bosch-Gymnasium.

Stefan Walter Hell is born in Arad, Romania in 1962.

Stefan Hell works under Siegfried Hunklinger on the imaging of transparent microstructures in a confocal microscope. He receives his Ph.D. in 1990.

Stefan Hell, Eric Betzig and William E. Moerner are awarded the Nobel Prize in Chemistry in 20014 for the development of super-resolved fluroescene microscopy.

For a brief period in 1990 Stefan Hell works as an independent inventor on improving depth resolution in confocal microscopy (4Pi microscope).

In 2002 Stefan Hell is appointed the director of the Max-Planck Institute for Biophysical Chemistry. He establishes the department of Nanobiophotonics.

Stefan Hell is visiting scientist at the University of Oxford. He works on the wavelength limitation of microscopy. Hell develops a method in which one light pulse causes fluorescent molecules to glow, while another causes all molecules except those in a very narrow area to become dark. Hell's concept breaks Ernst K. Abbe's (1873) diffraction-limited resolution barrier.