Answer
The age difference between Hadrian and Antinous was more than 30 years. Hadrian was 48 when he met Antinous, who was about 18 at the time. The two men quickly became close, and Antinous was eventually made Hadrian's heir and adopted son. However, Antinous died in a mysterious accident in 130 AD, and Hadrian was devastated by his loss.