Golden age

Many of the paintings of the French artist Claude Lorrain (1600s) show beautiful, peaceful, imaginary views of a "Golden Age". This picture is set in Ancient Greece.

Golden age is an expression (or term) that people use when they are talking or writing about a time that is past, when everything seemed to be good.

There are several ways that the term can be used.

This means a time in the history of Ancient Greece when the city of Athens had peace, good government and everyone had enough to eat.
This means a time when many artists in Denmark were painting very fine pictures.
This means that the person speaking says that their time at Harvard University was the happiest in their life.