Aqueducts were the roman method of transporting water and were devolved around 312 B.C.
Arches were one of the most popular designs of roman architecture, they were much stronger and cost efficient than building full walls.
Codexes were the earliest forms of books. they were bound paper on animal leather. on a time where all history was written on clay tablets there were an innovation and the start of the technology.
The gregorian calender is very close to the one we use today, it dates back 2000 years
Concrete was used to build most of the roman structures. The concrete was considerably weaker than modern day but it was at the time stronger than anything else they had.
The Twelve tables of the Corpus Juris Civils, these were a set of laws that put in place that covered everything from property, religion, divorce, and listed punishments for everything from, theft to black magic.
Acta Diurna, or also know as the "daily acts", were bulletins that were posted in heavily trafficked areas that publicized military, legal, and civil issues.
The Romans built many complex roads and highwasy to interconnect their empire, mainly for the service of military control. There were over 50000 miles of road in 200AD.
Roman field medics were very talented in their art for their time. They used such tools as hemostatic tourniquets and arterial surgical clamps to curb blood loss.
Roman government supplied welfare to orphans and poor children so that they could be properly fed, educated, and clothed. They used vouchers called tesserae to regulate it.