The latest finds by archaeologists at the site, once home to Northampton Castle, include a medieval silver penny and two Saxon oil lamps.
Andy Chapman from Northamptonshire Archaeology said: “The findings helped to paint a picture of how people lived and worked over 1,000 years ago.”
The dig has now ended and the station build starts later this month.
The latest finds join a wide collection of artefacts uncovered in the three-month long excavation, ranging from a medieval sharpening tool to a Saxon brooch.