July and August.
Yes they introduced a 12 month calendar
1869
First century AD Year 100
2324
The Romans didn't invent the microscope
No, the microscope was invented by van Leewonhook, a dutchman, about the year 1600.
The Romans invented concrete.
between 31 to 14 B.C. during the rule of Augustus
The Romans did not invent medicine. Forms of medicine already existed in the Mesopotamian civilisations and in Egypt and Greece. There were also forms of ancient medicine in India, China and other parts of the word.
The Romans invented concrete.
No.
No.