Hello Michael.
Attached to this reply are two Ordnance Survey Maps of Nenagh from different time periods, showing the location of the Summerhill Military Barracks. The maps are from the GeoHive website.
The first Ordnance Survey Map attached to this reply is from the 1837 to 1842 time period, and shows the location of the Infantry Barracks and Hospital situated within the Ordnance Ground in Summerhill. The map also shows the Nenagh Goal and Court House. The Goal is interesting in that its architectural style is that of a wheel and spoke formation, known as a Panopticon, as envisioned by English prison reform activist, Jeremy Bentham.
The second Ordnance Survey Map of Nenagh is from the 1888 to 1913 time period, showing the Infantry Barracks and buildings to the east of the barracks. You’ll also see on this map that the prison in Nenagh is closed, but the Court House is till in the same location as it was in the late 1830s and early 1840s.
I also found significant architectural details of the Nenagh Barracks, Summerhill, at the National Inventory of Architectural Heritage/Buildings of Ireland website.
The Buildings of Ireland site notes the barracks was constructed circa 1750, which would make the original section of the barracks 271 years old. The “wings” were added to the barracks in 1832. Go to the Buildings of Ireland website link for more information and a photo: https://is.gd/IB7AD8
For a modern-day Buildings of Ireland Map View of the Barracks, see: https://maps.archaeology.ie/historicenvironment/?REG_NO=22305015
You can also read a brief description of the Nenagh “infantry barracks,” from the 1837 edition of Lewis’s Topographical Dictionary of Ireland. The Topographical Dictionary is from the LibraryIreland website. The description of the barracks is toward the end of the third paragraph:
https://www.libraryireland.com/topog/N/Nenagh-Lower-Ormond-Tipperary.php
You’ve probably have already read the article about the barracks in the 14 January 2021 edition of The Nenagh Guardian. But in case you haven’t see the Guardian article at: https://is.gd/IsXdUx
The flickr photo by Joe Wade captures the terrible condition of the barracks: https://www.flickr.com/photos/ormond/3179221835/in/photostream/
You can add a photo and description of the Nenagh Barracks at Ireland Reaching Out’s “XO Buildings” database at: https://is.gd/1FFqnO
For examples of photos and descriptions added to the Buildings database, see: https://irelandxo.com/ireland-xo/history-and-genealogy/buildings-database
Best of Luck Michael,
Dave Boylan