I don't think its the Sun...the sun seems behind the clouds. The statues surroundings seem to 'dim' if the sun were to peep out of the clouds...
The orb, if it were a lens flare, I would think it would have to continure below the image, and would have been brighter and more solid looking....I've also never seen a lens flare being blue

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It could have been a cloud, but the surrounding clouds aren't as blue as the 'orb', but looks to me more of a cloud...cause it just does.