Key nabs Popoli's top docu prize
"Babooska," from Tizza Covi and Rainer Frimmel, won the Italian competition.
The international award carries a cash prize of €5,000 ($6,600), twice the value of the prize for the Italian competition.
"La Vie Est Une Goutte Suspendue" tells the story of the relationship between Key, the director and an aging diabetic philosophy professor.
"Babooska" is a documentary about the story of a young acrobat as illustrated in a provincial newspaper.
Other prizes handed out included "Ich Bin Ich" (I Am Me) from Australia's Kathrin Resetaris, which won for ethnic films. The Lorenzo de'Medici award, selected by a student jury, went to "Forever," a documentary from Dutch director Heddy Honigmann.