London's tallest building opens - with empty floors!

The view of the River Thames looking west from Tower Bridge including The Shard Skyscraper, City Hall and HMS Belfast at night in London, England. (Photo by Oli Scarff/Getty Images)

The Shard replaced Southwark Towers, a 24-storey office building constructed on the site in 1975. (Photo by Matthew Lloyd/Getty Images)

The Shard is seen lit up during a laser light show from Tower Millennium Pier on July 5, 2012 in London, England. The European Union's tallest building, designed by Italian architect Renzo Piano, stands at 310 meters tall situated on London's Southbank was formally inaugurated this evening with a laser show that was streamed live on the Internet. (Photo by Bethany Clarke/Getty Images)

The Shard - The European Union's tallest building was inaugurated July 5. At the time of the Shard's official opening, there are still no confirmed occupants, though it is expected that there would be full occupancy by the end of 2014. (REUTERS/Handout/Newscast)

The Shard is to contain office space, a 200-bed 5-star hotel, three floors of restaurants, ten apartments (priced at approximately £50 million each), (Photo by Matthew Lloyd/Getty Images)

"The elongated glass pyramid, built atop a train station in a scruffy neighbourhood near the Thames, will open with 26 floors of vacant office space, and developers have to fill it at a time when rents are at the flattest in at least 50 years," newswire Reuters reported. (AFP PHOTO/MIGUEL MEDINA)

According to media reports, Sellar Property, the firm in charge of seeking potential occupants, stated: "With the office space, we are being very selective. We don't want one single, overbearing occupant, we want a mix of media, finance companies, etc." (Photo by Bethany Clarke/Getty Images)

The Shard or Shard London Bridge (formerly known as London Bridge Tower or the Shard of Glass) is a skyscraper in Southwark, London. (Photo by Bethany Clarke/Getty Images)

LONDON, ENGLAND - JULY 05: Laser lights shine from The Shard over Tower Bridge on July 5, 2012 in London, England. (Photo by Matthew Lloyd/Getty Images)

The Shard towers over St Paul's Cathedral in this view from Parliament Hill on July 5, 2012 (Photo by Peter Macdiarmid/Getty Images)

The Shard was designed with an irregular pyramidal shape from the base to the top, and is clad entirely in glass. Its structure was completed in April 2012, and it opened to the public on 5 July 2012. (REUTERS/Luke MacGregor)

The tower has 72 habitable floors, with a viewing gallery and open-air observation deck – the UK's highest – on the 72nd floor, at a height of 245 metres (804 ft). (Photo by Peter Macdiarmid/Getty Images)

The Shard is seen from Mile End on July 5, 2012 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Renzo Piano, the Shard's architect, worked with the architectural firm Broadway Malyan during the planning stage.Renzo Piano is best known for creating Paris’s Pompidou Centre in collaboration with Britain’s Richard Rogers. (Photo by Peter Macdiarmid/Getty Images)

Piano was inspired by the railway lines next to the site, the London spires depicted by the 18th-century Venetian painter Canaletto, and the masts of sailing ships. (Photo by Ross Kinnaird - WPA Pool /Getty Images)

The Shard reflects a cloudy sky on July 5, 2012 in London, England. (Photo by Peter Macdiarmid/Getty Images)

Renzo Piano, the project's architect, compared his design to "a shard of glass". He considered the slender, spire-like form of the tower a positive addition to the London skyline, recalling the church steeples featured in historic engravings of the city and believed that its presence would be far more delicate than opponents of the project alleged. (Photo by Peter Macdiarmid/Getty Images)

Piano proposed a sophisticated use of glazing, with expressive façades of angled glass panes intended to reflect sunlight and the sky above, so that the appearance of the building will change according to the weather and seasons. (Photo by Peter Macdiarmid/Getty Images)

The building features 11,000 panes of glass. (Photo by Dan Kitwood/Getty Images)

In late 2007, the gathering uncertainty in the global financial markets sparked concerns about getting the Shard's construction started. The project was almost cancelled, but in January 2008, it was announced that a consortium of Qatari investors had paid £150 million to secure an 80% stake and take control of the project. (Photo by Peter Macdiarmid/Getty Images)

The new owners promised to provide the first tranche of finance, allowing construction of the tower to begin. The consortium included Qatar National Bank, QInvest, Qatari Islamic Bank and the Qatari developer Barwa Real Estate. The deal involved a buyout of the Halabi and CLS Holdings stakes, and part of the Sellar Property stake. (REUTERS/Handout/Newscast)

The Shard rises above The London Eye Ferris wheel seen from Hyde Park (Photo by Peter Macdiarmid/Getty Images)

The Shard rises between the spires of St Katherine's - The Danish Church on Regents Park on July 5, (Photo by Peter Macdiarmid/Getty Images)

Workmen abseil down the Shard (Photo by Dan Kitwood/Getty Images)

View of London from the 14th floor of the Shard in London July 4, 2012. REUTERS/Luke MacGregor

The view across the River Thames including The Shard Skyscraper and City Hall at night (Photo by Oli Scarff/Getty Images)

Since the Shard's construction was financed by Sharia-compliant investment, which forbids earning money through interest payments, the tower's tenants are subject to certain conditions. (Photo by Oli Scarff/Getty Images)

For example, most banks and companies connected to either the gambling or alcohol industries are unlikely to receive permission to lease space in a building which is backed by Islamic finance. (Photo by Peter Macdiarmid/Getty Images)

View of London from the 14th floor of the Shard in London July 4, 2012. REUTERS/Luke MacGregor

People watch as a window cleaner works outside the 14th floor at the Shard in London. REUTERS/Luke MacGregor