Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
The Roman nobility attached itself, in form, to earlier institutions
belonging to the times of the patriciate. Persons who once had filled
the highest ordinary magistracies of the state not only, as a matter
of course, practically enjoyed all along a higher honour, but also had
at an early period certain honorary privileges associated with their
position.
The most ancient of these was doubtless the permission
given to the descendants of such magistrates to place the wax images
of these illustrious ancestors after their death in the family hall,
along the wall where the pedigree was painted, and to have these
images carried, on occasion of the death of members of the family,
in the funeral procession.(3)