Denmark’s history is closely connected with Estonia’s capital, Tallinn, which according to the legend was the place where Dannebrog fell from the sky in 1219. On the 800th anniversary of the event, Her Majesty The Queen arrives in the city aboard the Royal Yacht Dannebrog and begins an official visit in the Baltic country.

More background info in english here:
http://kongehuset.dk/en/media-centre/press-releases/her-majesty-the-queen-visits-estonia

and in the wonderful, wonderful Danish language here:
http://kongehuset.dk/nyheder/hendes-majestaet-dronningen-besoeger-estland