Wearing Bermuda shorts and cameras, the gang worked in groups of three, with one stealing, another causing distractions and a third keeping a look-out. If they were caught, the thieves screamed, started fighting or even took their clothes off in the galleries to put off tourists while they made their escape.
At the height of their operation, the Louvre registered 138 thefts for the month of August 2012, with 138,000 reported stolen.
The charges largely relate to thefts in 2013, but police said the gang wired around 700,000 to Romania between 2005 and 2013.
Two women were among the alleged masterminds: Mariana Gandac, 25, alias Cinca, and Sandra Baciu, 35, known as "the Queen of Thieves". The pair are accused of co-ordinating around a dozen accomplices, mainly at the Louvre and Versailles. During one secretly recorded conversation, Ms Baciu confessed to "hating public holidays" as it brought more Parisians to the museums - who were of little interest to the gang.
Among the accused are a couple who say they met while stealing from the same handbag in 1994 in Rome. Police said the couple have several properties registered in their names in Romania.
- Telegraph Group Ltd