It was like discovering the Sistine chapel if you didn't know there had been a Renaissance - like knowing only modern art and then stumbling on the finger of God touching the hand of Adam.

In Western terms, it's like knowing only modern art and then stumbling on a Michelangelo or a Leonardo.

In that way it really is like you didn't know the Renaissance ever happened?you have no knowledge that anyone ever painted anything in Florence in the 16th century, then all of sudden you see a Michelangelo.

We then witness the maize god's birth, his death and his resurrection, before the wall ends with the coronation of a named and titled Maya king, newly crowned in the company of the Gods.

It has opened a window into the very origins of Maya civilization.

The way the Maya built pyramids is by building one layer on top of another. We have [the building where the writing was found] sandwiched between two other buildings. We can get a date from the building itself, but also a range from the other two.