It’s been more than a day since rescue teams set out to find five passengers who went missing in the North Atlantic during an expedition to the Titanic shipwreck. 

London-born Hamish Harding is aboard the Titanic-bound submarine alongside Stockton Rush, Paul-Henry Nargeolet, Shahzada Dawood and his son Suleman. 

So, what were these brave passengers hoping to see at the historic shipwreck, as they braved the ‘worst winter’ seen in Newfoundland, Canada, for the last 40 years?

While 111 years have passed since it sank, researchers continue to make discoveries at the Titanic – whether it be a megalodon shark tooth necklace or 1,200 teapots. 

Here, MailOnline has compiled a list of five priceless artefacts that the crew may have been hoping to see at the historic liner. 

1. Gold necklace with a megalodon shark tooth

The Explorers Club, which Mr Harding was a part of, said the 58-year-old was ‘looking forward to conducting research at the site’.

And perhaps new discoveries such as this may have been why. 

Earlier this month, an unusual necklace was revealed in new images from the wreckage of the Titanic.

The jewellery features the tooth of megalodon – an extinct species of shark that was one of the largest fish to ever exist.

Estimates suggest it could grow to 60 feet (18 metres) in length, which is three times longer than the largest recorded great white shark, according to the Natural History Museum.

The stunning artefact was identified in footage taken last summer by the Guernsey-based firm Magellan Ltd, which also took thousands of still images to create amazing 3D digital scans of the wreck. 

Other objects surrounding the necklace have not yet been identified, although it appears to be near a collection of beads. 

Richard Parkinson, director of Magellan, described the find as ‘astonishing, beautiful and breathtaking’. 

‘We found a megalodon tooth which is fashioned into a necklace – it’s incredible, it’s absolutely incredible,’ he told ITV News.

The firm now intends to use artificial intelligence to identify the owners of the necklace in addition to numerous other objects without taking it out of the ocean. 

2. Five Steinway pianos

Steinway & Sons has been selling some of the world’s priciest pianos for around 170 years.

Auctioning for thousands – and sometimes millions – of pounds, these pianos have been owned by an elite host of celebrities, from the 20th century pianist Arthur Rubinstein to Billy Joel.

But the New York-based firm also fell victim to the Titanic tragedy, losing five Steinways on that fateful day in 1912.

These pianos were transported all the way from Hamburg to the ship in mid-March of that year, designated to those onboard.

Three Steinways were specifically tailored to first class passengers, with a uniquely distinctive sound and a show-stopping appearance.

Even still, the other two were deemed to be of exceptional quality, with a classic 20th century look. 

David R. Kirkland, Administrator for Customer Service at Steinway & Sons in Long Island City said: ‘The pianos were fastened securely to the ship’s floors. 

‘When the Titanic submerged, the piano’s keys, hammers and hinged components suspended due to the buoyance of the wood. 

‘Although glues dissolve and metals corrode, at the bottom of the ocean amidst the wreckage there probably lie remnants that bear the name of Steinway & Sons.

‘I believe it to be inevitable one day that something will be raised.’

3. La Circassienne au Bain painting

The 1814 painting ‘La Circassienne au Bain’ is believed to have been one of the most expensive items to go down with the ship.

Painted by French artist Merry-Joseph Blondel, the stunning artwork depicted a young naked woman bathing in a setting from classical antiquity. 

While it received mixed reviews from critics, it was valued at $100,000 (£78,207), which is around $3 million today (£2.3million), according to Artnet.

Tammy Ellis, a history lecturer specialising in 20th century work, told MailOnline: ‘Unlike the names Monet and Picasso (both of which feature incorrectly in the 1997 James Cameron film of the famous sinking), nowadays most people would be hard-pressed to recognise the name of the then highly successful 19th century French artist Merry-Joseph Blondel.

‘Against a background of dense vegetation and classical architecture, a solitary and life-size nude woman, is about to enter her bath; little does she know that it will be her fate to be submerged for all time beneath the waters of the North Atlantic Ocean.’

4. Pink diamond 

On January 16 of 1913, The New York Times claimed that Titanic survivors had demanded a total of $6million (£4.6million) in compensation for lost possessions.

Jewellery, baggage and even dogs were among these in addition to one $20,000 (£15,640) pink diamond.

These gems are extremely rare in any size, and can sell for $50million (£39million) in some cases today.

The Titanic diamond of ‘six 7-16 carats’ belonged to Mrs Charlotte M Cardeza of Pennsylvania.

It is believed she was a first class passenger, having demanded $226,759 (£177,352) in total for her lost possessions.

This also included a ‘Burma ruby’ with two diamonds worth $14,000 (£10,949) and a bar of soap worth $1.75 (£1.37).    

5. Renault Type CB Coupe de Ville

You may recognise this vintage 1912 Renault from the Titanic movie – another artefact to have sunk with the ship.

Illinois’ Volvo Museum believes this car was brought onboard by a man named William Carter who survived the tragedy and made a claim for compensation.

As of now, this is the only known car to have been on the historic ship when it sank.

The museum said: ‘While some accounts suggest that the Renault was being shipped in a crate located in the forward section of the ship, which still remains relatively intact on the seafloor, it is uncertain whether the car is still salvageable after a century of immersion in salt water. 

‘Nonetheless, the Renault remains an important piece of Titanic history and an enduring symbol of the tragedy.’

It was in 1912 when the ‘unsinkable’ Titanic sank after crashing into a colossal iceberg.

As it descended into the North Atlantic, more than 1,500 lives were taken while thousands of treasures were lost to sea. 

Some of the wealthiest people in the world were onboard at the time including Isidor Straus, the co-owner of the famous Macy’s department store.

While 111 years have passed, Titanic researchers continue to find new objects today – whether it be a megalodon shark tooth necklace or 1,200 teapots. 

Here, MailOnline has compiled a list of five priceless artefacts that went down with the historic liner and are still assumed to be in the wreckage. 

1. Gold necklace with a megalodon shark tooth

Earlier this week, an unusual necklace was revealed in new images from the wreckage of the Titanic.

The jewellery featured the tooth of megalodon – an extinct species of shark that was one of the largest fish to ever exist.

Estimates suggest it could grow to 60 feet (18 metres) in length, which is three times longer than the largest recorded great white shark, according to the Natural History Museum.

The stunning artefact was identified in footage taken last summer by the Guernsey-based firm Magellan Ltd, which also took thousands of still images to create amazing 3D digital scans of the wreck. 

Other objects surrounding the necklace have not yet been identified, although it appears to be near a collection of beads. 

Richard Parkinson, director of Magellan, described the find as ‘astonishing, beautiful and breathtaking’. 

‘We found a megalodon tooth which is fashioned into a necklace – it’s incredible, it’s absolutely incredible,’ he told ITV News.

The firm now intends to use artificial intelligence to identify the owners of the necklace in addition to numerous other objects without taking it out of the ocean. 

2. Steinway pianos

Steinway & Sons has been selling some of the world’s priciest pianos for around 170 years.

Auctioning for thousands – and sometimes millions – of pounds, these pianos have been owned by an elite host of celebrities, from the 20th century pianist Arthur Rubinstein to Billy Joel.

But the New York-based firm also fell victim to the Titanic tragedy, losing five Steinways on that fateful day in 1912.

These pianos were transported all the way from Hamburg to the ship in mid-March of that year, designated to those onboard.

Three Steinways were specifically tailored to first class passengers, with a uniquely distinctive sound and a show-stopping appearance.

Even still, the other two were deemed to be of exceptional quality, with a classic 20th century look. 

David R. Kirkland, Administrator for Customer Service at Steinway & Sons in Long Island City said: ‘The pianos were fastened securely to the ship’s floors. 

‘When the Titanic submerged, the piano’s keys, hammers and hinged components suspended due to the buoyance of the wood. 

‘Although glues dissolve and metals corrode, at the bottom of the ocean amidst the wreckage there probably lie remnants that bear the name of Steinway & Sons.

‘I believe it to be inevitable one day that something will be raised.’

3. La Circassienne au Bain

The 1814 painting ‘La Circassienne au Bain’ is believed to have been one of the most expensive items to go down with the ship.

Painted by French artist Merry-Joseph Blondel, the stunning artwork depicted a young naked woman bathing in a setting from classical antiquity. 

While it received mixed reviews from critics, it was valued at $100,000 being $3 million today, according to Artnet.

Tammy Ellis, a history lecturer specialising in 20th century work, told MailOnline: ‘Unlike the names Monet and Picasso (both of which feature incorrectly in the 1997 James Cameron film of the famous sinking), nowadays most people would be hard-pressed to recognise the name of the then highly successful 19th century French artist Merry-Joseph Blondel.

‘Against a background of dense vegetation and classical architecture, a solitary and life-size nude woman, is about to enter her bath; little does she know that it will be her fate to be submerged for all time beneath the waters of the North Atlantic Ocean.’

4. Pink diamond 

On January 16 of 1913, The New York Times claimed that Titanic survivors had demanded a total of $6million in compensation for lost possessions.

Jewellery, baggage and even dogs were among these in addition to one $20,000 pink diamond.

These gems are extremely rare in any size, and can sell for $50million in some cases today.

The Titanic diamond of ‘six 7-16 carats’ belonged to Mrs Charlotte M Cardeza of Pennsylvania.

It is believed she was a first class passenger, having demanded £177,352.75 in total  for her lost possessions.

This also included a ‘Burma ruby’ with two diamonds worth $14,000 and a bar of soap worth $1.75.    

5. Renault Type CB Coupe de Ville

You may recognise this vintage 1912 Renault from the Titanic movie – another artefact to have sunk with the ship.

Illinois’ Volvo Museum believes this car was brought onboard by a man named William Carter who actually survived the tragedy and made a claim for compensation.

As of now, this is the only known car to have been on the historic ship when it sank.

The museum said: ‘While some accounts suggest that the Renault was being shipped in a crate located in the forward section of the ship, which still remains relatively intact on the seafloor, it is uncertain whether the car is still salvageable after a century of immersion in salt water. 

‘Nonetheless, the Renault remains an important piece of Titanic history and an enduring symbol of the tragedy.’

Forget ‘X’ marks the spot.

An amazing online map has been produced that pinpoints all the archaeological treasures around Europe – and further afield – and pulls up information about them at the click of a button.

Called Vici, the interactive digital map is described as an ‘archaeological atlas of classical antiquity’.

It’s inspired by Wikipedia, with more than 400 contributors adding pictures and information about sites and artefacts to the map since it launched in 2011. To date, there are more than 85,000 locations marked on the map and nearly 40,000 images.

Making them easy to track down, the exact coordinates of each site is identified.

With a particular focus on Europe, North Africa and the Middle East, the sites that feature on Vici.org include the Roman villa at Lullingstone, Kent, which dates back to around AD75 and features’ rich mosaic tiled floors’ and a burial chamber.

There is also the remains of Trajan’s Bridge in Romania – which was the world’s longest arch bridge for more than 1,000 years – and Malta’s roughly 5,000-year-old Mnajdra temple complex.

Rene Voorburg, who created the map, tells MailOnline Travel: ‘Nearly every day new places are added by the contributors. Some are very active and have added thousands of markers.’

Vici’s launch was preceded by that of a sister website, Omnesviae, which functions as a ‘Roman route planner’ that roughly retraces the route of the Peutinger map, a medieval copy of a Roman roadmap from around the year AD300.

Rene, 54, who is based in the small Dutch city of Houten, says: ‘Vici.org started because I wanted a map that displayed the locations of the hidden and visible remains of the Romans for my local area. Basically, I wanted to “see” what was where in Roman times; where was the vicus (village), the harbour, the castle, where were the roads, and so on.’

The landscape archaeology expert, who works for the Dutch national library as a data specialist, says that although the map was initially focused on Roman history, it quickly became an all-encompassing map of antiquity spanning up to the end of the medieval age. Some of the markers also identify museums all over the world where objects from antiquity are on display.

One standout item to appear on the map, according to Rene, is a dice tower – a small tower that would have been used in the playing of dice games – that was discovered in a Roman villa in Germany.

The words etched into the tower pay tribute to a military defeat of the Picts, a group of people that lived in Britain in the early Middle Ages. Rene says of the artefact: ‘I think it is fascinating to think about how it got there. Perhaps the owner of the villa fought the Picts and got this as a souvenir before he settled in nowadays Germany?’

How does Rene recommend that users interact with the map? He says: ‘Personally I like to “walk” around that map, by dragging it around and zooming in or out, and look at the images that appear. When I go on holiday somewhere, I also use vici.org to find interesting remains to visit.’

Omnesviae, meanwhile, gives an ‘indication’ of where the Roman roads might have been in Europe, rather than offering exact coordinates and routes, Rene reveals. He says that its purpose is to ‘tell the story of how advanced the Romans were and what a huge empire they had’.

He adds: ‘I also like the fact that it binds and connects us Europeans with a common – and rather cool – history.’

To experiment with Vici – or to contribute to the map – go to Vici.org.