Mourners across the globe have reacted to the attacks in Paris with tears and anger, but also with colourful shows of solidarity with France.
Monuments across the world, from the Sydney Opera House in Australia to One World Trade Center in New York, have been adorned with France's blue, white and red colours, while the French national anthem was sung in unlikely places.
Among politicians, there were loud calls for the world to ratchet up the fight against terrorism.
Bouquets, candles and messages of condolence were laid at French embassies worldwide.
A Twitter campaign has begun encouraging notoriously tribal England football fans to join with French travelling supporters in singing La Marseillaise, France's national anthem, before the kick-off in the friendly match between both countries on Tuesday.
Hundreds braved wet weather to gather in Sydney's Martin Place yesterday evening to show their support.
NSW Premier Mike Baird and French consular officials were among the crowd of about 200 people who held a few minutes' silence for the victims, close to the site of the deadly terror siege at the Lindt cafe just under a year ago.
Draped in French flags and carrying signs reading "We stand with France" and "We're praying for France", the crowd held hands and sang the national anthem twice during the vigil.
In another display of support, the sails of the Sydney Opera House were lit up in blue, white and red.
New York's Metropolitan Opera led by star tenor Placido Domingo mourned the victims of the Paris attacks with an unscheduled performance of the French national anthem.
The Marseillaise was also heard in the streets of Dublin, as 6000 marched in the Irish capital in solidarity with France.
The initial call for the march came via social media from 21-year old Juliette Charton, a French au pair living in Dublin, the Irish Independent reported.
Many participants were draped in the French tricolour flag and some carried placards reading "Pray for Paris" and "Je Suis Paris".
The European Union called for a minute's silence to be held on Monday for the victims of the attacks.
In Madrid and Barcelona, hundreds stood for a minute's silence outside city hall.
French President Francois Hollande received calls from world leaders including Egypt's President Abdel Fattah al-Sisi and Recep Tayyip Erdogan of Turkey.
Queen Elizabeth said she and her spouse Prince Philip were "deeply shocked," and British Prime Minister David Cameron offered Britain's help.
Indian Premier Narendra Modi called the attacks "anguishing and dreadful" and Hassan Rouhani of Iran condemned the attacks as "crimes against humanity."
"We share the sadness and the pain of the French people," said Russian Prime Minister Dmitry Medvedev. "The Paris tragedy requires of us all to unite in the fight against extremism."
Chinese President Xi Jinping said: "In these tragic times for the French people, I want... to condemn in the strongest ways this barbarous act."
The outpouring of support for France generated massive amounts of activity on social media, with the hashtags #prayforparis and #jesuisparis going viral.
One user, @emilymiddlemas_ , wrote "I am so heart broken! All my love and prayers go out to everyone affected by this horrible attack, when will this stop."
A "Peace for Paris" symbol, combining the city's beloved Eiffel Tower with the peace sign of the Sixties, has gone viral on the internet.
The designer is a 32-year-old French graphic artist, Jean Jullien, who lives in London.
Pope Francis expressed his profound distress and solidarity: "There cannot be justification, religious or human" for the attacks, he said.
Spanish Premier Mariano Rajoy declared, "We are all France," apparently echoing France's support for the United States ("We are all Americans") after 9/11.
Kenyan President Uhuru Kenyatta: "Our common humanity has been attacked in Paris by terrorists, and innocent civilians murdered in cold blood."
Algerian President Abdelaziz Bouteflika: "This planned horror is a real crime against humanity."
Petro Poroshenko, Ukraine's president: "Terrorism is our common enemy." The grand imam of the prestigious Al-Azhar mosque in Cairo called the attacks "despicable", adding "It is time for the whole world to confront this monster."
Israeli Prime Minister Benjamin Netanyahu: "Israel stands shoulder to shoulder with French President Francois Hollande and with the people of France in our common battle against terrorism."
Greek Prime Minister Alexis Tsipras said: "The terrorists will defeat us ... if they force us to abandon our values, and lead us to a fortified Europe inhabited by fearful peoples."
Irish rock band U2: "Our hearts go out to all the victims and their families across the city tonight."