Aristophanes, a Greek playwright, wrote and directed a drama The Birds, first performed in 414 BC, in which Pisthetaerus, a middle-aged Athenian persuades the world’s birds to create a new city in the sky to be named Nubicuculia or Cloud Cuckoo Land[3] (Νεφελοκοκκυγία, Nephelokokkygia), thereby gaining control over all communications between men and gods.

Source: Cloud cuckoo land – Wikipedia