In 1975, the roof of the Montreal Velódromo, weighing 3.7x10^7 N, was raised by 10 cm to achieve centralization. The work done in this process can be calculated using the formula for gravitational potential energy (GPE), which involves the weight of the object and the height it is raised. The discussion focuses on the mechanics and calculations involved in lifting the heavy structure. Machines were utilized to perform this task, highlighting the engineering capabilities of the time. Understanding the work done in this context is crucial for analyzing similar structural modifications.