This was an open area attached to the king's palace that was surrounded by buildings and in which they kept prisoners. See how you translated this in [Jeremiah 32:2](./01.md).
A shekel is 11 grams. AT: "17 shekels" or "187 grams" (See: [[rc://en/ta/man/translate/translate-bmoney]] and [[rc://en/ta/man/translate/translate-numbers]])