Is the Mona Lisa protected by glass?

Some of the changes inaugurated this week are subtle. For instance, while the "Mona Lisa" has been protected by glass since 1960, the painting has now been installed in a new sealed enclosure, behind 1.52-inch-thick glass, and at a permanent temperature of 43 degrees Fahrenheit and 50 percent humidity. read more

On August 2, 2009, a "deranged" Russian woman threw a ceramic mug at the Mona Lisa, which at that point was protected by bulletproof glass. The woman was taken by police to a psychiatric infirmary and was found to be angry over being turned down for French citizenship. read more