Armed with power tools, a crane lift, motorbikes and a plan straight out of a movie, four thieves broke into the Louvre Museum to steal jewellery once worn by France's queens and emperors.

It happened in broad daylight, while the museum was open, and took just 4 minutes.

With the thieves still at large and an investigation underway, attention has now turned to what will happen to the jewels.

Here is what experts say the thieves could be considering and why they were stolen in the first place.

Why were the jewels stolen?

We don't know.

The only way we'll find out the truth is if the thieves are caught.

But associate professor in art history at the University of Sydney Donna Brett said there could be a number of different reasons.

"It could be a targeted theft for someone who wan

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