Napoleon was so attentive or perhaps, he was just being polite. Martin Luther appeared bored, even a bit disagreeable. But it was later learned that he was not feeling all that well to begin with.
Desiderius Erasmus with ear to the speaker and eye to the paper took copious notes. It was uncertain as to whether Frederick the Great was greatly shocked by the words or displeased by the view. ...and Voltaire, well, was mildly amused by it all.
In the end, the minds agreed, it was rude for the guest, Oedipus, to have put his feet on the furniture.