Dreaming of historical figures usually means we are aware of the qualities that those people possessed. Perhaps we need to develop those qualities within ourselves.
2- Old people in dreams tend to suggest traditional thought or wisdom arising from experience (See People). We may also need to consider our attitude to death. Old buildings can signify a past way of life which we thought we had left behind. Antiques will often represent elements of our past experience which might be worth keeping.
3- The Wise Old Man (See Introduction) is a part of ourselves which is not always consciously available to us.
An old man appearing in our dreams puts us in touch with this part of ourselves.
He can also represent our feelings about time and death.