File:Wikipedia.png

Wikipedia logo

Copyright information
This logo is copyrighted by and for the Wikimedia Foundation. The use of this logo to illustrate an article describing, reviewing, and/or criticizing Wikipedia (and especially its English version) is an example of fair use under the United States Copyright Act. The administration expressly forbids any other use of this logo to illustrate any other article, without the administration's express permission. Any editor having any questions is invited to contact the administration for clarification.

Source
Wikimedia Commons.