Photo shows the "Big Maple Leaf" ,the gold coin worth millions of U.S. dollars which was stolen from the Bode Museum, on March 27, 2017. (Photo courtesy of Bode Museum)

BERLIN, March 28 (Xinhua) -- A gold coin worth millions of U.S. dollars was stolen in the early hours of Monday from a Berlin museum, the police in the German capital confirmed.

The coin -- known as the "Big Maple Leaf" -- was issued by the Canadian Royal Mint in 2007, and features an eponymous leaf on one side and Queen Elizabeth II on the other.

According to the Bode Museum, the purity of the gold of the coin was in the Guinness Book of Records, with an exceptional level of 999.9/1000.

While the coin itself has a face value of one million U.S. dollars, the gold it is made of was estimated to be worth around 4.5 million dollars.

Police assumed that it would have been a group of thieves to pull off the heist in the museum, given that the coin weighs about 100 kilograms, with a diameter of 53 centimeters.

The Bode Museum in central Berlin has one of the largest collections of coins in the world, in its famous Muenzkabinett or coin cabinet which houses some 500,000 rare coins.