The Arch of Janus in the forum Boarium of Rome, constructed in the 4th century CE. The four-way marble arch probably acted as a boundary marker and, perhaps not coincidentally, stands directly over the Great Drain or Cloaca Maxima which fed into the river Tiber.
Donate and help us!
We're a non-profit organisation and we need your help! This website costs money and we have to buy quality research material to produce great content. Our donors make this project possible. Please consider donating; even small amounts help. Thank you!