Palaistra

In primitive times the palaistras had no architectural character; a meadow and a sandy reach, generally upon the bank of a brook and shaded by trees, sufficed as a training-ground.

Source: wiktionary

Particular Sophists attached themselves to particular gymnasia and palaistrai which they came to regard as their schools.

Source: wiktionary

Where did he train the teams of his fellow-tribesmen? Probably he hired trainers in the private palaistrai.

Source: wiktionary

The Old Oligarch, contradicting his assertions about education above, later claims that although a few rich people have gymnasia and baths of their own, the people builds for its own use many palaistrai and baths (2, 10).

Source: wiktionary