Issued by Éire (Ireland) in 2005, this 48-cent definitive stamp features a finely detailed black-and-white illustration of the Round Tower at Kilmacduagh, County Galway. The ancient monastic site, founded by St. Colman MacDuagh in the 7th century, is home to Ireland’s tallest surviving round tower—rising about 34 meters and noted for its slight lean. The stamp design highlights the harmonious blend of medieval stonework and early Christian architecture, capturing the serene atmosphere of this historic ecclesiastical landmark. It forms part of Ireland’s series celebrating the nation’s cultural and architectural heritage.