By clicking the mouse on the various periods (AD) you can see
the development in time of the 100 tombs described in this presentation.
Only the tombs that are nowadays visible are shown. Remember,
however, that many apparently empty spots initially were occupied
by older graves. Those graves are or were situated below the still
existing tombs. They are, as far as they are known, mentioned
at the description of the 100 tombs. Many of the older tombs probably
got lost in the mists of time.