Prince Henry’s Room in London is a historic chamber located on the first floor at 17 Fleet Street, one of the few buildings in the City of London that survived the Great Fire of London in 1666. Originally built in 1610 as a tavern known as The Prince’s Arms, it is linked to Prince Henry, eldest son of King James I, symbolized by the Prince of Wales’s feathers and “PH” initials in the ornate Jacobean plaster ceiling. Though named after Prince Henry, he likely never used the room much, as he died two years after its construction. The building also served as a tavern called the Fountain Inn and hosted Mrs Salmon’s Waxworks in the 18th century. 
 
Interesting facts....
The building was once part of the Knights Templar property in medieval times. All the other timber buildings along Fleet Street were lost in the fire. It's remarkable this one survived.