If you stand in front of St Paul’s cathedral and look to your left, towards Paternoster Square, you’ll see a stone arch with windows and well-worn statues. This is Temple Bar. Hard to believe now, but there were once human heads on poles adorning the top of it.

The structure was built in 1670 by Sir Christopher Wren, the great architect who gave us St Paul’s Cathedral and many smaller churches. He set about rebuilding London in the aftermath of the Great Fire of London, a vast inferno that consumed much of the ancient city.

This terrible event had one upside. It gave Wren the opportunity to design a new and more ordered metropolis. However, poor Wren’s hopes of creating piazzas and wide streets was confounded at every turn by stubborn Londoners and their wish to keep the medieval winding thoroughfares and dark alleys.

So, why did Wren build Temple Bar?

The stone gate replaced wooden posts and chains that separated the City of London from the City of Westminster. It was originally positioned across the road in front of what’s now the Royal Courts of Justice. On one side was Fleet Street in the City and on the other was The Strand leading to Whitehall and the centre of royal government.

Everybody entering the City had to pass under the Temple Bar. It wasn’t entirely popular. For one thing, it held up traffic. The archway soon became way too narrow for the mass of carts, horses, carriage and people trying to cram through and do business.

It also had four poorly crafted statues of James I, Elizabeth I, Charles I and Charles II that were described in very unflattering terms by one Victorian writer as “mean” with “small feeble heads”. They’re not the greatest works of art it must be said.

The man who carved these mediocre works of art was called John Bushnell. By all accounts, he was somewhere between eccentric and insane. One scheme he devised was to prove that the Greeks could have invaded Troy by building his own Trojan Horse out of timber and covering it in stucco.

He spent £500 of his own money (a vast sum then) on this project creating a horse’s head that could hold a dining table to seat twelve people. The whole thing fell to pieces during a storm.

There is a room along the top portion of Temple Bar that was used as a storage room for Child’s bank. On the very top of Temple Bar, the heads of traitors once stared down on passers-by. This was meant to be an object lesson for 17^th and 18^th century Londoners not to rebel against their anointed kings and queens.

The first head to appear on Temple Bar was Sir Thomas Armstrong involved in the so-called Rye House Plot. Next came Sir William Perkins and Sir John Friend who planned to assassinate King William III as he returned from hunting in Richmond – intercepting his coach between Brentford and Turnham Green.

They were hanged at Tyburn despite pleading their innocence – and their heads removed for public display.

In a ghoulish twist, typical of London, there were enterprising people in 1746 who were reportedly hiring out looking glasses at Temple Bar so that passers-by could take a closer look at the severed heads. It cost a halfpenny apparently. In 1766, a man was arrested for firing musket balls at the heads – which he then confessed to having done for three nights running.

In 1772, one of the heads blew down during a storm. Incredibly, the blackened object had been on top of Temple Bar since 1723 – nearly fifty years! A chap called John Pearce took it to a local tavern where it was then buried under the floor. Must have been an amusing subject of conversation beforehand!

Between 1880 and 2003, Temple Bar sat forlornly in a park in Hertfordshire. It was bought by the Meux brewing family. The City of London sold it to them as they’d long wondered what to do about what had become an unloved traffic obstruction. However, nearly twenty years ago it was uprooted once more and brought back into town.

Temple Bar has returned to the centre of London – not blocking any traffic and not sporting any severed heads.