Have you ever wondered how tall the Romans were? How about medieval knights? According to the following study, by Nikola Koepke and Joerg Baten, which shows the annual average height from the first to the eighteenth century, the average height of Europeans, male and female, in the 4th century was about 169 centimeters or about 5'5.
The Biological Standard of Living in Europe During the Last Two Millennia