The titles of nobility are personals, it is private property of individuals , the titles are not property of the States , Vienna Convention of 1816?, other concept different is the form of goverment of the states,Republics or monarchies..... In Republics, titles of nobility haven´t normative value. In monarchies, yes. The title of King of the Hellenes is property of King Constantine. The form of government of the Greek state is a republic since 1974.
other picture: http://4.bp.blogspot.com/-73xYC0-4BLc/USor8249maI/AAAAAAAABlI/B0Znlvbg0nk/s1600/ioannina.jpg
They dress very relaxed - I wonder if it is to emphasize they are private citizens?
Thank you for posting these photos.