Location: Rome, Italy
One of the most facinating things that we saw in Rome was a sundial-like thing that was constructed inside a church that use to be a Roman bath.
Sundial-like thing = Meridian Line.
Church = Santa Maria delgi Angeli e dei Martiri.
Roman bath = Baths of Diocletian.
We spent over an hour analyzing every detail of the sundial. In the end we concluded that it could tell you the approximate day of the year and time of the day. It even had a star chart! It was so cool that J wanted to go back on his birthday just to see where the light fell on the line. Unfortunately, we never made it.