The centre's sole anchor was Toronto-based Simpsons-Sears. The store fronted on a plaza which displayed "Equatorial Sundial," a sculpture created by Duane W. Eichols and Jim S. Willer.
Photo from University of Manitoba, Winnipeg Building Index

A newspaper advert announcing the grand opening of the Prairie Province's POLO PARK CENTRE. This took place on August 20, 1959.
Advert from Simpsons-Sears, Limited and David Slater, Limited

Here we see the mall's Centre Court area. "Acrobats," an abstract sculpture by George Swinton, stood in a reflecting pool.
Photo from http://www.winnipegarchitecture.ca