The world marks tragic day in history: How the sinking of the Titanic, death of ... trends now
Today might seem like any other Monday, but, to many, it will bring back memories of horror and tragedy.
For April 15 is the anniversary of the 1989 Hillsborough disaster, the 2013 Boston Marathon bombing and the 2019 Notre-Dame fire.
The Titanic also sank on April 15, 1912 with the loss of more than 1,500 lives, whilst US President Abraham Lincoln was shot dead at the theatre on this day in 1865.
Below, MailOnline delves into the stories of each.
Assassination of Abraham LincolnAbraham Lincoln, the US President who led his country through the American Civil War, was shot by John Wilkes Booth on April 15, 1865.
Lincoln had been visiting the Ford's Theatre in Washington DC with his wife Mary and companions Major Henry R. Rathbone and Clara Harris when he was attacked.
The president, who was shot in the back of the head, succumbed to his wounds the following morning.
The assassinations were part of a conspiracy to kill the president, Vice President Andrew Johnson and Secretary of State William H Seward.
Abraham Lincoln had been visiting the Ford's Theatre in Washington DC with his wife Mary and companions Major Henry R. Rathbone and Clara Harris when he was attacked
Lincoln, the US President who led his country through the American Civil War, was shot by John Wilkes Booth on April 15, 1865
Booth fled to Garrett's Farmhouse in Virginia, where he was found by soldiers 11 days afterwards.
After refusing to surrender, he died in a shootout with his would-be captors.
Booth was a Confederate sympathiser and was also virulently opposed to the abolition of slavery.
In an attack that took place on the same night as Lincoln's assassination, Seward - who had been injured in an accident a few days before - was targeted at his home.
He was stabbed in the face and neck but survived, whilst Johnson was never attacked.
Lincoln's body lay in state in the White House and then the Capitol Rotunda before it was taken by train to Springfield, Illinois, where it was buried.
Sinking of the TitanicAt just before midnight on April 14, 1912, the RMS Titanic hit an iceberg while travelling on its maiden voyage from Southampton to New York.
Within three hours, the ship had slipped beneath the waves of the freezing Atlantic Ocean, killing more than 1,500 people.
At its launch, the luxurious Titanic - the largest ship in the world - was touted as being 'unsinkable' and was carrying some of the planet's wealthiest people.
Also on board were hundreds of people from Britain, Ireland and elsewhere who were seeking a new life in the United States.
At just before midnight on April 14, 1912, the RMS Titanic hit an iceberg while travelling on its maiden voyage from Southampton to New York. Within three hours, the ship had slipped beneath the waves of the freezing Atlantic Ocean, killing more than 1,500 people
The world did not learn of the full horror of the disaster until three days afterwards, when rescue ship the Carpathia made it to New York.
Until then, headlines had proclaimed 'no lives lost', or 'all passengers being taken off'.
Ever since its sinking, the Titanic has remained a subject of enduring global fascination.
The ship's wreck was finally discovered in September 1985 by a team led by US Navy officer Robert Ballard.
Since then, there have been dozens of dives to the site and objects including crockery, shoes and jewellery have been recovered.
However, the dangers of visiting the wreck were brought into sharp focus last year with the deaths of the occupants of the OceanGate Titan submersible.
OceanGate CEO Stockton Rush died along with French expert Paul-Henri Nargeolet, businessmen Hamish Harding and Shahzada Dawood, and Mr Dawood's teenage son Suleman.
The five's initial disappearance led to a frantic global rescue operation as searchers hoped they would find them alive in the ocean.
However, after days of
