Complex sentence: Hemingway won the Massey medal twice for his architecture: the Peter Hemingway Fitness and Leisure Centre formerly known as Coronation Pool (1968--1970) and the Stanley Engineering Building (1968).
Split into simpler sentences: Hemingway won the Massey medal twice for his architecture projects. The Peter Hemingway Fitness and Leisure Centre formerly known as Coronation Pool (1968--1970) and the Stanley Engineering Building (1968).