Twisty laneways and stone archways…frescoed Italianate and Byzantine churches…piazzas packed with gaily-canopied cafés. And within Kotor’s triangular-shaped old town, no traffic. Hidden in the far reaches of the Boka Kotorska fjord in northern Montenegro, Kotor is the country’s most authentic medieval walled city. Framed by ominous-looking mountains, it’s set beside the hypnotically blue Adriatic, in …