The major fire that has engulfed Copenhagen’s historic stock exchange, one of its oldest and most iconic buildings, has been brought under control, the head of the Danish capital’s fire brigade said on Tuesday. The cause of the fire, which broke out suddenly on Tuesday morning, remains unclear. Half of the stock exchange had more or less burnt down, according to the fire brigade. Around 135 firefighters and other emergency workers were deployed, along with volunteers from the armed forces. Copenhagen suffered its “Notre Dame moment” after the exchange, which is known as Børsen in Danish, was e…