Here are some general secondary works to help start your research. We also welcome suggestions of additional sources.
J. Darwin, ‘A World University’ in B. Harrison (ed.), The History of the University of Oxford: Vol. VIII: The Twentieth Century (Oxford, 1994), pp. 607-636.
E. Impey, ‘The Rhodes Building at Oriel, 1904–2011: Dynamite or Designate?’, Oxoniensia 76 (2011), pp. 95–104.
R. Symonds, Oxford and Empire: The Last Lost Cause? (Oxford, 1992).
R. Symonds, ‘Oxford and the Empire’ in M. G. Brock and M. C. Curthoys (eds.), The History of the University of Oxford: Volume VII: Nineteenth-Century Oxford, Pt. 2 (Oxford, 2000), pp. 689-716.
E.T. Williams, ‘The Rhodes Scholars’ in M. G. Brock and M. C. Curthoys (eds.), The History of the University of Oxford: Volume VII: Nineteenth-Century Oxford, Pt. 2 (Oxford, 2000), pp. 717-728.
Many colleges also have published histories, which contain a wealth of details on individuals etc.
See also the Oxford Archivists' Consortium bibliography
Empire and Britain
C. Hall, N. Draper, K. McClelland, K. Donington, R. Lang, Legacies of British Slave-ownership (Cambridge, 2014).
B. Schwarz, Memories of Empire. Volume 1: The White Man's World (Oxford, 2011).
B. Schwarz, ‘Black metropolis, white England’ in M. Nava and A. O’Shea Modern Times: a reflection on a century of English Modernity (1996)
A. Thompson (ed.), Britain's Experience of Empire in the Twentieth Century (Oxford, 2011).
W. Webster, Englishness and Empire 1939-1965 (Oxford, 2005).
Built Environments and Material Culture
A.L. Araujo, Politics of memory: making slavery visible in the public space (2012).
G. Adamson and G. Riello, ‘Global objects: contention and entanglement’ in M. Berg (ed), Writing the History of the Global: Challenges for the Twenty-First Century (2013) [e-book]
R. Ater, ‘Slavery and Its Memory in Public Monuments’, American Art 24:1 (2010), 20–23.
C. N. Buzinde, C.A. Santos, ‘Representations of slavery’, Annals of Tourism Research 35:2 (2008), 469-488.
L. Baedeker, T. Barringer and R. Flynn (eds), Colonialism and the Object: Empire, Material Culture and the Museum (1998).
G. Alex Bremner, ‘Nation and Empire in the Government Architecture of Mid-Victorian London: The Foreign and India Office Reconsidered’ The Historical Journal 48:3 (2005), pp. 703-742.
J. Brownell, ‘A Sordid Tussle on the Strand’: Rhodesia House during the UDI Rebellion (1965–80) Journal of Imperial and Commonwealth History 38:3 (2010): 471-499.
R. Craggs, ‘The Commonwealth Institute and the Commonwealth Arts Festival: Architecture, Performance and Multiculturalism in Late-Imperial London’, The London Journal 36:3 (2011), pp. 247-268.
R. Craggs and C. Wintle (eds.), Cultures of decolonisation: Transnational productions and practices, 1945–70 (Manchester, 2016).
M. Dresser, ‘Set in Stone? Statues and Slavery in London’, History Workshop Journal 64:1 (2007), 162-199.
F. Driver and D. Gilbert (ed.), Imperial Cities: Landscape, Display and Identity (2003).
M. Finn and K. Smith (eds), The East India Company at Home 1757-1857 (2018) [open access at http://www.ucl.ac.uk/ucl-press/browse-books/the-east-india-company-at-home]
A. Gerritsen and G. Riello (eds), Writing Material Culture History (2015).
T.F. Gieryn, ‘What buildings do’, Theory and Society 31 (2002), pp. 35-74.
S.D. Lubar and D.W. Kingery (eds), History from Things: Essays on Material Culture (1995).
A. Rice, Creating memorials, building identities: the politics of memory in the Black Atlantic (2010).
J. Sibon, ‘Monument Mania’? Public Space and the Black and Asian Presence in the London Landscape’ in P. Ashton and H. Kean (eds), People and Their Pasts: Public History Today (2009), 1 46-162.
J. Siblon, ‘Negotiating Hierarchy and Memory: African and Caribbean Troops from Former British Colonies in London's Imperial Spaces’, The London Journal 41:3 (2016), 299-312.
W. Whyte, ‘How do Buildings Mean? Some Issues of Interpretation in the History of Architecture’ History and Theory 45:2 (2006), pp. 153-177.
Built Environments in Oxford
Royal Commission on Historical Monuments, An Inventory of the Historical Monuments in the City of Oxford (1939)
Victoria County History, A History of the County of Oxford.• Volume 4, the City of Oxford (1979)
Historic England, National Heritage List for England
Imperial War Museum, War Memorials Register
Nikolas Pevsner and Jennifer Sherwood, Buildings of England: Oxfordshire (1974)
Geoffrey Tyack, Oxford: An Architectural Guide (1998)
Memory, History, Legacies
Pierre Nora, ‘Between Memory and History: Les Lieux de Mémoire’, Representations, No. 26, Special Issue: Memory and Counter-Memory (Spring, 1989): 7-24
Indra Sengupta (ed.), Memory, History and Colonialism: Engaging with Pierre Nora in Colonial and Postcolonial Contexts (2009) [open-access online via www.ghil.ac.uk]
Ann Laura Stoler, ‘Imperial Debris: Reflections on Ruins and Ruination’ Cultural Anthropology, Vol. 23, No. 2, Imperial Debris (May, 2008): 191-219.