The Eiffel Tower was lighted in the colors of the Belgian flag on Tuesday night in a sign of solidarity after a series of terror attacks. The landmark is bathed in the colors black, yellow and red.
The mayor of Paris, Anne Hidalgo, made the announcement on her Twitter account.
She posted: "In solidarity with the people of Brussels, Paris will light up the Eiffel Tower in the colours of the Belgian flag tonight. #Weareunited."
Paris dealt with its own series of attacks in 2015 that left more than 125 people dead. Several of the attackers had links to Belgium.