The founding of Rome has been pinpointed to the year 753. For the city of St. Petersburg, records even indicate the precise day the first foundation stone was laid.
Historians don't have access to this kind of precision when it comes to German cities like Hanover, Kiel or Bad Driburg. The early histories of nearly all the German cities east of the Rhine are obscure, and the places themselves are not mentioned in documents until the Middle Ages. So far, no one has been able to date the founding of these cities.
Our ancestors' lack of education is to blame for this dearth of knowledge. Germanic tribes certainly didn't run land survey offices -- they couldn't even write. Inhabitants this side of the Rhine -- the side the Romans never managed to occupy permanently -- used only a clumsy system of runes....
The problem wasn't radiometric dating (if that is what you meant by "original science"). Rather, it is the issue of human documentation; if you look up the history of many German cities, historians have been reluctant to date them back any further than the Middle Ages, for lack of manuscript evidence & no obvious connection between the ancient & modern names. The point of the article is, they can now correlate with more confidence the Roman place names with the Medieval (assuming their clever method is indeed valid!).
Many European towns do have names that are traceable back to Imperial Rome; e.g., London, Regensburg.
Roman ruins can be found in many German towns, as I found out firsthand.