Daniel Calley, City of Derry, An Historical Gazetteer to the Buildings of Londonderry, UAHS, 2013.
S.J. Connolly, Belfast 400, People, Place and History, Liverpool University Press, 2012.
Maurice Craig, The Architecture of Ireland from Earliest Times to 1800. Lambay Books, 1997.
Ciaran J Devlin, The Making of Medieval Derry, Veritas, 2013.
Hugh Dixon, An Introduction to Ulster Architecture, UAHS, 2008.
Evans, Hackett, Hall, Larmour & Ratty, Modern Ulster Architecture, UAHS, 2006.
WS Ferguson, AJ Rowan & JJ Tracey, Historic Buildings, Groups of Buildings, Areas of Architectural Importance, In and Near the City of Derry, UAHS, 1970.
Alan Gailey, Rural Houses of The North of Ireland, John Donald Publishers, 1984.
Brian Lacey, Siege City, The Story of Derry and Londonderry, Blackstaff Press, 1990.
Brian Lacey, Medieval and Monastic Derry, Sixth Century to 1600, Four Courts Press, 2013,
Larmour & O'Toole, North by Northwest, The Life and Work of Liam McCormick, Gandon Editions 2008.
Alf McCareary, Saint Patrick's City, The Story of Armagh, The Blackstaff Press,2001.
Kevin V Mulligan, An Introduction to the Architectural Heritage of County Monaghan, National Inventory of Architectural Heritage, 2013.
Northern Ireland Buildings Database, www.doeni/niea.gov.uk
Ruairi O'Baoill, Island City, The Archaeology of Derry~Londonderry, NIEA & Derry City Council, 2013.
Alastair Rowan, The Buildings of North West Ulster, Yale University Press, 1978.
BG Scott, RR Brown, AG Leacock and CJ Salter. The Great Guns Like Thunder, The Cannon from thr City of Derry, Guildhall Press, 2008.
John Summerson, The Classical Language of Architecture. Thames and Hudson, 1980.
Round Tower Gravestone, City Cemetery, Derry~Londonderry.
Round Tower. Turlough, Co Mayo.
Round Tower, Ardmore, Co Waterford.