Desmond Walter Guinness was an Anglo-Irish author of Georgian art and architecture, a conservationist and the co-founder of the Irish Georgian Society. He was the second son of the author and brewer Bryan Guinness, 2nd Baron Moyne, and his then wife Diana Mitford.

The Irish Georgian Society is an architectural heritage and preservation organisation which promotes and aims to encourage an interest in the conservation of distinguished examples of architecture and the allied arts of all periods across Ireland, and records and publishes relevant material. The aims of this membership organisation are pursued by documenting, education, fundraising, grant issuance, planning process participation, lobbying, and member activities; in its first decades, it also conducted considerable hands-on restoration activities.