Representatives of the royal houses of Denmark, Sweden and Norway, along with the presidents of Finland and Iceland, are visiting Berlin on Monday to mark the 25th anniversary of the Nordic embassy complex in the German capital. German President Frank-Walter Steinmeier will receive Denmark’s King Frederik X and Queen Mary and Icelandic President Halla Tómasdóttir with full military honours on their inaugural visits to the country. In October 1999, the five countries opened a combined embassy complex in the Tiergarten district in central Berlin, close to the parliamentary and government buildin…