Eiffel Tower worth 344 billion to French economy

 Italy's Monza and Brianza Chamber of Commerce declared the Eiffel Tower  to be worth six times its nearest rival, the Colloseum in Rome, valued at 91 billion euros .

The study by based its findings on a monument's “image, brand and visibility”, calculated by cross-referencing 10 different parameters from various analysts and statistics bodies.

More at  The Telegraph
Thanks Bruce!