Royden Stock - The Sage of St. Pancras

Back in 1996, when I first saw the interior of what was then called St. Pancras Chambers, I was astonished that I had never paid this building much attention in the past.
But I am not the only person to pass the building without really noticing it or knowing exactly what it is, as I have discovered over the years since then.
Many thousands of people visited the building while it was open to the public between 1997 and 2005. Very few of these people knew the origin or what lies inside.