Sperello di Serego Alighieri was born in Perugia, Italy, in 1952. He became Doctor in Astronomy (summa cum laude) at the University of Padova in 1975. After a fellowship from CNR he obtained a position as astronomer at the Padova Observatory in 1978, working on extragalactic astronomical research and on the development of astronomical instrumentation. From 1980 to 1984 he worked for the Astronomy Div. of the Space Science Dept. of ESA at ESTEC in The Netherlands on the Faint Object Camera for the Hubble Space Telescope (HST) and as Project Scientist for the Phase A study of the far UV space observatory Magellan. From 1984 to 1990 he worked for ESA as HST Istrument Scientist at the Space Telescope European Coordinating Facility in Garching, Germany. Since 1990 he is at the Arcetri Astrophysical Observatory in Firenze, Italy, working on astrophysical research in the extragalactic area (galaxy evolution, active galactic nuclei). In the period 1995-98 ha has been Director of the Centro Galileo Galilei for the Italian telescope TNG on the Canary Island of La Palma.