Prince Louis of Cambridge hasn’t been seen since he was born, but expect more adorable photos of the newest royal baby soon after his christening.

Prince Louis — the third child of the Duke and Duchess of Cambridge and the fifth in line to the British thronewill be christened on Monday at St. James’s Palace’s Chapel Royal, which has been home to many important moments of British royal history, including royal weddings and other religious ceremonies.

Prince Louis’s christening will also be the his first appearance with the complete royal family, including his siblings Prince George and Princess Charlotte.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave St. Mary’s Hospital with their newborn son Prince Louis of Cambridge.

Anwar Hussein—WireImage

In preparation for Prince Louis’s christening, here are 5 things to know about the historic Chapel Royal:

Prince George was also christened there

The St James’s Palace before the christening of Prince George in the Chapel Royal.

John Stillwell —WPA Pool — Getty Images

Prince Louis isn’t the only royal baby from his immediate family to be christened at the Chapel Royal.

While Louis’s older sister Princess Charlotte was baptized at the Church of St. Mary Magdalene in Sandringham, Prince George’s christening was at the Chapel Royal in 2013. Prince George’s ceremony was officiated by the same reverend, Archbishop of Canterbury Justin Welby, who will…