Access to a 360-year-old passage remained hidden for about 70 years.
It was thought that the walkway was walled up forever after World War II.
The British monarchs used the passage the first time for procession to the 17th-century coronation banquet of Charles II and for other coronations after that. For 150 years royalty gained access through it from the hall to the original House of Commons chamber.
The route was originally found by workers who carried out repairs after the building was bombed in World War II. They made a discreet wooden door into the paneling. With time, the door was forgotten and it was assumed that the repairs had blocked this passage completely.
Rediscovery happened last year when a restoration team looked through archival documents. A key was made to open the door and inside they found two, 11 feet tall and 6 feet wide, doors.
There was a note on the wall that read, “This room was enclosed by Tom Porter who was very fond of Old Ale.” The restoration works continue and we still may be notified about new discoveries.