This pictorial map serves as a visual reference for the historical heraldry and geographic origins of Ireland's prominent medieval families. Nora O'Shea compiles nearly 200 distinct coats of arms, providing a structured overview of Irish lineage and clan identity. The work functions as both a genealogical resource and a decorative historical document, organizing complex heraldic data into a single, accessible format.

This map provides a clear, visual entry point for those interested in Irish genealogy and heraldic history. Its focus on accessibility and aesthetic presentation makes it a useful tool for casual researchers and those exploring their ancestral heritage.