The woman wrote “AE911” on the bottom right-hand corner of the painting before she was challenged by a security guard and a visitor.

A Louvre conservation expert cleaned off the writing yesterday and the unharmed painting will be on show to the public once again this morning.

“AE911Truth” is the name of a website for Architects & Engineers for 9/11 Truth, a group which claims that the official version of the terrorist attacks on Manhattan and Washington on 11 September 2001 is a cover-up. — independent.co.uk

The €150m satellite of Paris's Louvre museum shimmers like an apparition on the raised plane of the former coalmine, looking down over streets of pitch-roofed miners' houses, dotted with the occasional chip shop. The building is formed from a series of long, low-slung walls that fade in and out of view as the changing light dances over its surface – or as clouds of drizzle engulf it entirely in the wintry gloom. — guardian.co.uk