The 1904 Nobel Peace Prize was awarded to the Institute of International Law.
The Peace Prize committee is an entirely separate entity from the rest of the Nobel committee and like to make up their own rules. The committees responsible for the science prizes are still bound by the rule that each prize can only be awarded to 3 people or less.
> The committees responsible for the science prizes are still bound by the rule that each prize can only be awarded to 3 people or less.
ITYM s/less/fewer/
Yes, but there's talk that this longstanding convention may be at least temporarily broken with next year's physics Nobel. Little more than a rumor at this point.
Next year, it's likely we'll see a physics Nobel honoring CERN for discovering the Higgs -- another appropriate example of an institutional Nobel.