Where did shah jahan imprisoned by aurangazeb?

Shah Jahan was imprisoned by his son Aurangzeb in the Red Fort of Agra. After being overthrown in a coup, he spent the last eight years of his life in confinement. It is said that during his imprisonment, he could gaze at the Taj Mahal, the mausoleum he had built for his wife, Mumtaz Mahal, from his cell.