"According to European Copyright Law, such monuments are protected for
the lifespan of the work’s legal creator—plus 70 years. The Tower’s
creator, Gustave Eiffel, died in 1923, so in 1993 it re-entered public
domain, but there’s still un petit problème: The lights installed by
Pierre Bideau didn’t ignite until 1985, which means nighttime images
and videos that feature his choreographed light show are still
protected under the law."