The Eiffel Tower glowed red, white, and blue in honour of the victims of Friday's horrific attacks in Paris.
The iconic landmark, like many others in the French capital, had been closed to the public.
For the next three days, the tower will be lit up in the colours of the French flag after a request by the Paris mayor, said administrators of the attraction.
The tower went dark after Friday's violence, which was widely mistakenly as a tribute to victims. The tourist attraction turns off its lights every day at 1 a.m. to conserve energy.
Over the weekend, landmarks all over the world lit up in the colours of the French flag in solidarity with Paris.