Cathedral of San Ciriaco
60–90 min · Free; donations welcome
Ancona's landmark cathedral crowns Guasco hill over the harbour, combining Romanesque and Byzantine forms on a site with ancient and early-Christian layers.
Strenuous uphill approach; church floor mostly easy
Ancona Tourism's 2026 cruise-season schedule lists extended daily opening, including continuous 08:00–19:00 from 30 May to 26 September; worship and ceremonies take priority.