From central Rome you take the suburban **Roma–Lido (now Metromare) train** toward the coast.
- Go to **Porta San Paolo** station (next to **Piramide** on Metro line B).
- Follow signs for the **Roma–Lido / Metromare** line toward **Cristoforo Colombo**.
- For the ruins, get off at **Ostia Antica**; it’s about a 5–10 minute walk over the pedestrian bridge to the site.
St. Monica died in Ostia but her remains were later transferred to a church in Rome.