Landmarks have been lit up and vigils held around the world in a show of solidarity with France in the aftermath from the Paris attacks.

As the Eiffel Tower stood dark in a symbol of mourning, the London Eye, Tower Bridge and the National Gallery were lit up in the red, white and blue of the French tricolour.

Sydney's Opera House, the Taipei 101 skyscraper in Taiwan, the Senate building in Mexico City, One World Trade Center in New York and several other monuments were also lit up.

Image: Leo Correa / AP/Press Association Images

In Ireland, vigils took place at the Spire in Dublin and Spanish Arch in Galway.

Thousands gathered for the French solidarity march in Dublin. Image: Sam Boal /Rollingnews.ie

The Empire State Building's lights were shut off in a tribute to Parisians.

New York Mayor Bill de Blasio joined hundreds of people for a vigil at Washington Square Park. The square's landmark arch was lit in the blue, white and red.

People participate in a candlelight vigil near the Washington Square Arch. Image: Mary Altaffer / AP/Press Association Images

The Eiffel Tower and other popular tourist spots have been shut down, major sporting events were cancelled and hundreds of soldiers are guarding key sites.

Although large gatherings of people have been discouraged in the city amid fears of further attacks, many have been leaving flowers and candles at the scenes of the violence.

Others have been paying their respects to the 129 people killed by lighting candles in their windows.

A crowd of up to 250 people gathered for an impromptu candlelight vigil at the Place de la Republique, the site of a massive demonstration in the wake of the Charlie Hebdo killings earlier this year.

Adrien Chambel, a 27-year-old law student, said the crowd was much sparser than in January, and added: "You feel that people are petrified."

However images yesterday showed that a huge number of people in Paris have taken to their local blood donation clinics to try and help at a time when there would be increased demand.