This was the apogee of his reign.

After the satellite reached the apogee, it continued in orbit, becoming closer to the center of Earth.

Some people may argue that the apogee of human intelligence was when humans were not so reliant on technology.

The small town reached its apogee when the new steel mill opened.

In the course of the next few months he gathered into his hands every branch of the government: he had reached the apogee of his short-lived greatness.