The tomb was built in 56 B.C., which means 56 years 'Before Christ'.
The pyramid was built in 9 B.C., which means 9 years 'Before Christ'.
We are currently living in A.D.(After Death) era.
So the number of years before which the tomb was built = Current year + 56
Number of years before which the pyramid was built = Current year + 9
∴ We can easily say that the pyramid is a more recent structure.