This is a book of centuries with a 2 page spread for each century from 4000 BC (Creation) to the Present 21st Century. It is meant to be printed front and back (double sided). The top page contains a timeline with the particular century highlighted in red. This allows the student to see where this particular century falls in the grand scheme of all of the centuries. There is also a cross on each two page spread at 0 AD depicting the birth of Christ.