Nenagh the bustling provincial town owes its origins to the Norman
Butlers who build a castle here in 1220. Nearby are the remains of a
medieval Franciscan Abbey. In the mid 19th century it prospered as a
garrison town. Reminders of this period are to be seen in the
preserved facade of the Old County Gaol. There are two neo-gothic
churches, St. Mary's of the Rosary built 1896 and St. Mary's Church
of Ireland built 1860, both noted for their stained glass windows
from the famous Harry Clarke studio.