Pictures: World landmarks in rainbow lights for Orlando
The Eiffel Tower and Sydney Harbour Bridge are among the world landmarks that have been lit up in rainbow colours for the victims of the Orlando attack.
The Eiffel Tower in Paris, France, has been lit up in rainbow colours. It's a show of support for the victims of the Orlando attack, which happened in the early hours of Sunday morning.
The Sydney Harbour Bridge in Australia has also been paying tribute to the 49 people who were killed in a shooting at a gay nightclub.
The rainbow colours are a symbol of pride for gay people around the world. This is the One World Trade Center in New York, USA.
Places in the UK have also been showing their support, like St George's Hall in Liverpool. American police are investigating why the attack happened, but it could have been because of hatred towards gay people.
These brightly coloured columns are in Piazza del Plebiscito in Naples, Italy. The gunman was shot by police before he could do more harm.
This is how the centre of Brussels in Belgium looked covered in rainbow lights. People have also been showing their support in other ways - such as donating blood to help the injured, holding vigils and going on marches.