For Regina, I'd have to vote the old Capital Theatre. Maybe not the most iconoclastic piece of architecture, but from an urban fabric point of view, tearing down the last old-style theatre in the downtown area has pretty much doomed downtown Regina to be an uneventful place after business hours. What replaced it was the new Crown Life Insurance building built when the company moved from Toronto. There's a quality sordid political story there, but I won't get into it. Here's a couple shots of the Capital:
