Ellen Johnson Sirleaf
Prize presentation
Watch a video clip of the 2011 Nobel Peace Prize Laureate, Ellen Johnson Sirleaf, receiving her Nobel Prize medal and diploma during the Nobel Peace Prize Award Ceremony at the Oslo City Hall in Norway, 10 December 2011.
Nobel Prizes and laureates
Six prizes were awarded for achievements that have conferred the greatest benefit to humankind. The 12 laureates' work and discoveries range from proteins' structures and machine learning to fighting for a world free of nuclear weapons.
See them all presented here.
Explore prizes and laureates
Look for popular awards and laureates in different fields, and discover the history of the Nobel Prize.