This is a 99% invisible. I'm Roman Mars.

When the Statue of Liberty was dedicated in 1886, it was a dull copper color.

The whole statue is covered with a layer of copper metal about the

thickness of two pennies. But after about 1900 the physical processes that

govern the known universe began to take their toll and the copper skin oxidized into a greenish patina that can be seen on the statue to this day.

When the statue underwent a massive restoration in the 1980s, the head and shoulder were

realigned. The point on the crown that had been digging into her arm for a century was

shortened. The defects in the internal skeleton were thoroughly addressed.

And of course, the weather-beaten exterior was cleaned.

But there was no notion that the statue's skin should be returned to the dull copper color she was born with.

But if they had shined up Lady Liberty to her original copper color, the people of New York City probably would have reacted like this.

I don't like looking at it.

This is not someone from New York, as you can probably guess.

That's Barbara Clark. Five generations of her family have lived in Sterling, Scotland.

My name's Barbara Clark and I've lived in Sterling all my life apart from when I was at university. Sterling is also the home of Sterling Castle, a truly marvelous place that I just love to visit that sits atop a giant Craig or hill overlooking the whole town of Sterling. Some castle has been there since the

12th century and maybe before, but the current buildings date from the 15th and 16th centuries.

Well, obviously it's part of our lives.

We see it every single day, and as children we plead in it.

We ran all around it.

When we think of medieval castles, we usually picture a grand structure with subdued dark stone masonry. But when you gaze upon

Sterling Castle today from the town below, you will notice that one of the buildings is different from the others.

Since 1999, after a long restoration effort, the Great Hall of Sterling Castle has been

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