Opposite, and from the same era, is the Examination Hall, where concerts are given occasionally when no examinations are in progress, but is otherwise rarely open to the public (look through the spy hole in the door! )
The spy hole on the door is cracked and broken. 
mnli hypothesis: The spy hole on the door is cracked and broken.  premise: Opposite, and from the same era, is the Examination Hall, where concerts are given occasionally when no examinations are in progress, but is otherwise rarely open to the public (look through the spy hole in the door! )