Iconic works of art get exhibited worldwide. But as those paintings age, they can become too fragile to withstand travel around the globe. The paint can be visually examined to gauge its integrity. But the only way to check the canvas had been to remove a piece destructively.
"Never continue in a job you don't enjoy. If you're happy in what you're doing, you'll like yourself, you'll have inner peace. And if you have that, along with physical health, you will have had more success than you could possibly have imagined." -- Johnny Carson