The reign of the ________ dynasty has been described as the golden age of Indian civilization.

The period of the Gupta Empire (ruling roughly from the early 4th century CE to late 6th century CE) is widely referred to as the "Golden Age of India". This period saw massive advancements, achievements, and contributions in the fields of science, mathematics, astronomy, literature, art, philosophy, and architecture under rulers like Chandragupta I, Samudragupta, and Chandragupta II.