Ulisse Aldrovandi, Italian ornithologist and botanist (died 1605)

Ulisse Aldrovandi was an Italian naturalist, the moving force behind Bologna's botanical garden, one of the first in Europe. Carl Linnaeus and the comte de Buffon reckoned him the father of natural history studies. He is usually referred to, especially in older scientific literature in Latin, as Aldrovandus; his name in Italian is equally given as Aldroandi.

September 11 is the 254th day of the year in the Gregorian calendar; 111 days remain until the end of the year.