The picture is from an ad for a booklet of the currecnt EU presidency in an EU-magazine. They really seem to love the dragon.
"E!Sharp – the bimonthly magazine on European Union affairs - provides lively analysis of European Union affairs that is in-depth but accessible, as well as provocative opinion pieces by leading academics, businessmen, policy-makers and correspondents in Europe and elsewhere. The magazine is widely read by decision-makers in both policy-making and business circles, in Brussels and in national capitals around the EU." http://www.peoplepowerprocess.com/
Also in the publication itself, they spend one full page (page 8 of 40) on the dragon: http://www.hillandknowlton.be/docs/SlovenianPres.pdf Publisher "Hill & Knowlton provides experience of national, European and international government relations, media relations and operating with the European institutions. Hill & Knowlton specialises in guiding clients through the European Union decision-making process, from providing monitoring and intelligence gathering services to pro-active opinion forming, communications and lobbying campaigns (ibid, p.36).
More info on the Slovenian dragon-bridge: http://en.wikipedia.org/wiki/Dragon_Bridge There is a legend that Jason was the founder of Ljubljana, and he and his Argonauts killed a dragon. This is one of the four dragon statues in the bridge. More things on Jason can be found here: LINK (excerpt from the last link: "So because these two fighting brothers, Atreus and Thestes, were the golden fleece, they were also the Ares/Rus dragon, which then corresponds to the Biblical dragon that rules Rome prior to the coming of Jesus")