text: A cleaning of this rectangular painting revealed that it was originally intended to be a ceiling painting with its corners cut so that its final shape is octagonal.
full_question: A cleaning of this rectangular painting revealed that it was originally intended to be a ceiling painting with its corners cut so that its final shape is octagonal. This painting, which was originally painted for the Scuola Grande, depicts a marble temple in the background whose façade consists of four pilasters that have human forms as tops. A man in this painting is about to be blinded for travelling to Alexandria to venerate a certain saint. On its right side, a knight of Provence sits on a throne and gives orders to a white-turbaned man, whose two hands clutch a broken hammer. At the top of this painting, which depicts a man who is about to be tortured and executed, a red-robed, orange-caped saint intervenes from the skies. For 10 points, name this painting in which St. Mark descends and frees the title servant, the first mature masterpiece of Tintoretto.
first_sentence: A cleaning of this rectangular painting revealed that it was originally intended to be a ceiling painting with its corners cut so that its final shape is octagonal.
raw_answer: The Miracle of the Slave [or St. Mark Freeing a Christian Slave; or The Miracle of St. Mark]