Photos of the Eiffel Tower at night are illegal due to copyright (2017)

You can almost never find videos or photos of the Eiffel Tower at night on stock sites. European Union copyright law states that an artistic work (that could be a photo, video, song, or building) is protected during the lifetime of its creator, plus another 70 years. The copyright owner and creator of the Eiffel Tower died in 1923, so in 1993 the image of the Eiffel Tower entered into the public domain.

Source: petapixel.com