The official coat of arms (seal) of Reykjavik, Iceland. See "additional info" below for use restrictions.
Own work based on: Reykjavik Coat of Arms.png by Pollodiablowiki
The owner of this insignia states RULES REGARDING ITS USE at http://www.rvk.is/Portaldata/1/Resources/skjol/merki/Reglur.pdf . There seem to be limitations on use in self-representation (other than that of the municipiality itself) of organizations, sport teams etc. but not on use intended to describe the subject for educational purpose.
According to Icelandic law, copyright does not protect work that has no financial purpose. (http://www.althingi.is/lagas/nuna/1972073.html).

According to Icelandic law, design is not protected if it includes a coat of arms that has a special meaning for the public (http://www.althingi.is/lagas/136a/2001046.html).