Jerome41, do you actually think the ancients didn't know what pi was? The circular shape you are referring to wasn't something solid like a pillar, but a round vessel, a "molten sea", which contained "2000 baths". The diameter given would have referred to the outside diameter, since that is the assumption when a diameter is given. And the circumference, by even being mentioned, would have been referring to the *INSIDE* circumference of the vessel, since the outside circumference could already be derived by the outside diameter. The rim itself, therefore, would have been about 1/2 a cubit wide on each side. The Bible is literature as well as history, so reporting a dimension in such language as "31.4159 cubits" just won't do.