Complex sentence: The Ardagh Hoard, best known for the Ardagh Chalice, is a hoard of metalwork from the 8th and 9th centuries, found in 1868, it is now on display in the National Museum of Ireland in Dublin.
Split into simpler sentences: The Ardagh Hoard, best known for the Ardagh Chalice, is a hoard of metalwork from the 8th and 9th centuries. Found in 1868, it is now on display in the National Museum of Ireland in Dublin.