Codex Robertsbridge is a medieval music manuscript dating back to the 14th century, containing a collection of sacred and secular compositions. This important source provides insight into the musical practices and repertoire of the time, offering valuable information for musicologists studying medieval music history. The codex is named after the town of Robertsbridge in East Sussex, where it was discovered in the 19th century, and it remains a significant resource for understanding the musical traditions of the medieval period.