The Tower of Hercules
Translation: What was the Roman Tower Like?
You know that the exterior of the tower is not from the Roman time but from the 18th century. So, the question is: what was the Roman tower like?
The German scholar Siegfried Hutter imagined it like the pic below. Describe it.
However this is not the only hypothesis possible. In fact, this is not the most well-accepted now. See this video and find out what the accepted reconstruction is. Then describe it in your own words.