Supertramp, at the Halifax Forum - 1975?!?!
Bruce Cockburn, at the Rebbecca Cohn Auditorium (Dalhousie University, 1990?).
I Mother Earth, not sure of the name of the venue, but located on Brunswick street, Halifax, NS. (1996?).
UZEB, Zapata's Halifax, NS. (time frame - early to mid 1980's).
Also, Tony Bennett, Loreena McKennitt, and Manteca, all separate dates, but at my favourite venue - the [aforementioned] Rebecca Cohn, because the acoustics are superior to sports and other venues.