Upon my honor
I saw a Madonna
Standing in a niche
Over the door
Of the glamorous whore
Of a prominent son of a bitch.

Said to have been written in the guest-book of Hearst Castle, referring to the room occupied by Hearst's mistress, Marion Davies. Parker always denied it, pointing out that she would never have rhymed "honor" with "Madonna".

Since Parker didn't write it, there are many different versions of this, including ones where the word describing the whore is "favorite" or "famous", and ones where "son of a bitch" is modified by "the world's worst" instead of "a prominent".