Friary Court is a prominent courtyard within St James’s Palace in London, England. It holds significant ceremonial importance, especially related to the British monarchy. After the death of a reigning monarch, the Accession Council meets here to declare the new monarch. The Garter King of Arms then steps onto the Proclamation Gallery overlooking Friary Court to announce the new sovereign.
The court is named after the Friary of Capuchins who arrived in England in 1662 with Catherine of Braganza, wife of Charles II. It is one of four courtyards within St James’s Palace and has been the site of many royal events, including the christening of Prince George of Wales in the adjoining Chapel Royal
 
Interesting facts...
While Buckingham Palace is the monarch’s residence, St James’s Palace is where the crown’s official business happens. It is considered the real seat of royal power.
After King Charles I was executed, his body was taken to St James’s Palace. Unlike other traitors, his head was sewn back onto his body before being placed in a lead coffin for viewing in the palace