Some of the best-known monuments in Europe and elsewhere have been illuminated with Belgium's national colors in a show of solidarity after the attacks in Brussels.
At nightfall Tuesday, the Eiffel Tower in Paris lighted up in the black, yellow and red colors of the Belgian flag.
Berlin's landmark Brandenburg Gate, which after the November attacks in Paris was illuminated with the French colors of red, white and blue, also was lighted up in Belgian colors. A few blocks away, some people laid flowers and lighted candles outside the Belgian Embassy.
And in Italy, Rome's Trevi Fountain joined in the show of Belgium's colors.
San Francisco City Hall