Ernest Cadine was a French Weightlifter who won the Light-Heavyweight Gold medal at the 1920 Olympic Games held in Antwerp, Belgium. His winning total was 295 kg (649 lbs.) though the contested events were very different then: the one-arm snatch, the one-arm clean and jerk and the two arm clean and jerk. His performance in these lifts was 70 kg, 90 kg and 135 kg respectively. He also set six World Records over his competitive career.
In 1925, Cadine performed a one-arm swing with 90 kilos which was actually greater than his own bodyweight. Cadine could also right hand snatch 211 pounds and one-hand deadlifted the famous Apollon Wheels.
Also of note is the sand-pit floor — you’ll see this feature a lot in old school physical culture gyms as it made it so globe barbells and dumbbells were not damaged if they were ever dropped.