On Tuesday, Paris Mayor Anne Hidalgo announced that the tower would be lit in black, yellow, and red, to show solidarity after terrorist attacks of the morning left at least 31 dead and many more injured.
— Dimitri Boschmann (@bosch_sputnik) March 22, 2016
— Julian Carter (@julianlcarter) March 22, 2016
A number of other cities across the world have lit their monuments in the colors of the flags of Belgium and the European Union.
Rome's Campidoglio Capitol Hill
© AP Photo / Andrew Medichini
Makeshift memorials have also sprung up across Brussels.
People bring flowers and candles to mourn at the Place de la Bourse in the center of Brussels.
© AP Photo / Martin Meissner
US President Barack Obama has ordered flags to remain at half-mast until March 26.
— Mark Knoller (@markknoller) March 22, 2016
With nightfall in the United States, the One World Trade Center in New York City also honors the victims on Tuesday evening, as well as City Hall.
— Phil Walzak (@PTWalzak) March 22, 2016
— Max Guliani (@maximusupinNYc) March 22, 2016
The Empire State Building will remain dark on Tuesday evening as a show of solidarity.
