It was completely torn down by Napoleon, and that was done for a very good reason...

which would be too long to tell you about now.

And what about their treasure? What are the odds of finding it today?

Oh, but you wouldn't want me to spoil the fun for when I tell you the whole story in person, would you?

We still have in the Marais a "rue du Temple" which leads to the Temple Square. This was the site of the fortress of the Knights Templar which lasted long after they were exterminated and burned at the stake at the western tip of the City Island by king Philip IV (The Fair) in 1314.

This is what the fortress looked like just before the Revolution: