Lucian of Samosata Hippias 7

[7] When you have bathed, you need not go back through the same rooms, but can go directly to the cold room through a slightly warmed apartment. Everywhere there is copious illumination and full indoor daylight. Furthermore, the height of each room is just, and the breadth proportionate to the length; and everywhere great beauty and loveliness prevail, for in the words of noble Pindar, ¹ “Your work should have a glorious countenance.” This is probably due in the main to the light, ‘the brightness and the windows. Hippias, being truly wise, built the room for cold baths to northward, though it does not lack a southern exposure; whereas he faced south, east, and west the rooms that require abundant heat.