Article content For almost two decades, a compact office building on 7th Avenue S.W. was home to Dome Petroleum, as the famed Calgary company led by Smilinâ Jack Gallagher searched for oil and gas across Western Canada and the Arctic. Those days are long gone. We apologize, but this video has failed to load. Try refreshing your browser, or Varcoe: From Dome Petroleum HQ to affordable housing â 'a cool transformation' for downtown Calgary Back to video Today, the 10-storey tower is a shell of a structure, with floor upon floor of unused offices. Paint is peeling in the stairwells. The street-level coffee shop is shuttered, with mugs, chairs and tables still sitting in place, waiting for people to return.