The lowdown on royal christenings

As the Windsors prepare for Prince Louis's christening, here is a look at what to expect from a royal baptism:

They are usually private
Christenings for Windsor babies are conducted behind closed doors, except for Princess Eugenie's.

Princess Eugenie's christening
Princess Eugenie's christening

She became the first royal baby to have a public christening, during morning service at the Church of St Mary Magdalene at Sandringham in 1990.

Photographs will be taken of Prince Louis on his big day though.

The ceremony takes place soon after birth
Prince George was three months old and Princess Charlotte was only nine weeks at their christenings. Louis will be 11 weeks old.

Christening of Prince George of Cambridge
Christening of Prince George of Cambridge

One of the longest waits for a christening was for Eugenie, who was nine months old.

The godparents are announced on the morning of the christening
Rather than just three godparents - the minimum suggested by the Church of England - royal babies have a lot more.

George has seven, Charlotte has five, the Duke of Cambridge has six, the Queen had six and the Prince of Wales had eight.

William and Kate have picked five godparents for Princess Charlotte. George had seven

-- PA Royal Reporters (@PARoyal) July 5, 2015

William and Kate usually opt for confidantes over royal relatives
Kate and William chose three close friends, a Spencer relative and a Middleton relative as Charlotte's godparents but no members of the royal family.

Royal babies traditionally used to have kings and queens and other royals as godparents.

Charles's godparents in 1948 included King George VI, Queen Mary, Princess Margaret, the King of Norway and Prince George of Greece.

The christening of Prince Charles - Buckingham Palace, London
The christening of Prince Charles - Buckingham Palace, London

The Cambridges take inspiration from the past
At Charlotte's christening, Prince George's outfit was almost an exact copy of the red shorts and embroidered white shirt his father wore to meet baby Prince Harry for the first time.

Princess Charlotte's christening
Princess Charlotte's christening

Charlotte was pushed to her christening in a vintage 1950s silver-wheeled Millson pram - once used for the Queen's youngest children Prince Andrew and Prince Edward.

The christening robe
Royal babies are christened in a replica of the intricate lace and satin christening gown made for Queen Victoria's eldest daughter.

Christening of Prince George of Cambridge
Christening of Prince George of Cambridge

It was created by the Queen's dresser Angela Kelly.

The original Honiton lace and white satin robe, made in 1841, was last used in 2004 and is too delicate to be worn.

Holy water
According to tradition, the water used for Louis's christening will be holy water from the River Jordan, where it is said Jesus was baptised by John the Baptist.

Lily font
Louis will also be christened using the ornate silver gilt Lily Font - part of the Crown Jewels.

The Lily Font
The Lily Font

It is decorated with lilies and ivy foliage around the rim, features three cherubs around the base, and the main bowl is a large lily bloom.

Protecting the reputation of Queen Victoria's family
The font was specially commissioned by Queen Victoria to prevent her children being tarnished by association with the illegitimate offspring of Charles II, who were all born out of wedlock and christened using the previous font, the Charles II Font.

Cake for tea
Guests are likely to be served a slice of William and Kate's wedding cake, just as they were after George and Charlotte's christening.

William and Kate's wedding cake
William and Kate's wedding cake

It was designed by Fiona Cairns and made from 17 individual fruit cakes, with eight tiers. They saved a tier for their future children's baptisms.

Extravagance used to be the order of the day
Victoria staged a lavish celebration at Windsor for the christening of her son, the future Edward VII, in 1842.

She wore her Sovereign of the Garter robes and a diamond tiara and organised a long day of grand events including a state banquet and a christening cake over 8ft in diameter.

Timings can be tricky
According to biographer Andrew Morton, Diana, Princess of Wales complained she was not consulted over the best time for Prince William's christening in 1982.

"Nobody asked me when it was suitable for William. 11 o'clock couldn't have been worse," she said.

Prince William's christening - Buckingham Palace
Prince William's christening - Buckingham Palace

There have been dramas
Queen Victoria's mother the Duchess of Kent broke down sobbing during her daughter's christening in 1819 when a cantankerous Prince Regent refused to allow her to name her daughter Georgiana and insisted she be called Alexandrina Victoria instead.

And guests have not always been well behaved
At the christening of Queen Victoria's daughter, Princess Alice, in 1843, the Queen's uncle, Ernest, King of Hanover, arrived late, behaved rudely and made a public fuss in a dispute with Victoria over the ownership of certain royal jewels.

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