It has not yet been confirmed which holy water Prince Louis will be baptised with next week but for both Prince George and Princess Charlotte, water was flown in from the River Jordan. The river is believed to be where Jesus was baptised by Saint John and is a popular place of pilgrimage for many Christians. According to the BBC, for Princess Charlotte’s christening the water was transported by the Jordanian royal court. Photo: Getty

Royal babies are baptised in the silver Lily Font, which takes its name from the expanded flower. The font was constructed in 1840 after being commissioned by Queen Victoria and Prince Albert for the baptism of their first child Victoria, according to the Royal Collections Trust. It was first used on the date of the christening in February 1841 in the Throne Room of Buckingham Palace. Aside from when it is needed for christenings, the font is kept in the Jewel House section of the Tower of London. Photo: Getty

The christening of Prince Harry was included in the Queen’s annual Christmas message in 1984 as the christening had taken place just four days prior. Harry was also christened at St George’s Chapel in Windsor Castle, where he married Meghan Markle in May. The choice of christening venue was another departure from tradition, according to Sally Bedell Smith’s biography on Prince Charles, Prince William had been christened in Buckingham Palace. Photo: Getty

Though the royal christening robe is worn by new royal babies time and time again, it is actually a replica of the original one commissioned by Queen Victoria first used for the christening of her eldest daughter in 1840. Made of Spitafields silk and Honiton lace it has been worn by 62 royal babies including the Queen and both Prince William (pictured) and Harry, But, in 2004, the Queen’s senior dresser deemed the christening gown too fragile to be worn again so made a replica. The first baby to wear this new replica was the son of the Edward and Sophie, the Earl and Countess of Wessex, James. Prince George and Princess Charlotte both wore it after and it will most likely be the gown Prince Louis is christened in too. Photo: Getty

In a break from tradition, the Duke and Duchess of York’s youngest daughter Eugenie had a public christening during a normal Sunday church service at St Mary Magdalene church in Sandringham in 1990. Eugenie is reportedly the Queen’s only grandchild not to have been christened at the Lily Font too. Photo: Getty

In the majority of cases, it is the most senior bishop in the Church of England who conducts royal baptisms therefore Prince Louis will be christened by the Archbishop Justin Welby next week. However, Princess Elizabeth was actually christened (pictured) by the Archbishop of York, Cosmo Gordon Lang (who later became the Archbishop of Canterbury) in April 1926 at Buckingham Palace. The Archbishop of York is the second most senior bishop in the Church of England. Photo: Getty

The Chapel Royal in the grounds of St James's Palace actually holds regular Sunday services open to the general public. The venue is steeped in history too. It is where Queen Victoria and Prince Albert were married, and where the Queen’s grandparents King George V and Queen Mary married in 1893. The chapel was damaged by a bomb in the second world war but has since been fully restored. Photo: Getty