Remembering History: "The Museum of the History of Science, Oxford has a polyhedral sundial in the shape of an octagon that has been attributed to Nicolas Kratzer: The sundial made about 1425 for Cardinal Wolsey. The four-sided base has Wolsey's arms, the arms of York Minster, and (on two sides) a cardinal's hat."

"The Museum of the History of Science, Oxford has a polyhedral sundial in the shape of an octagon that has been attributed to Nicolas Kratzer: The sundial made about 1425 for Cardinal Wolsey. The four-sided base has Wolsey's arms, the arms of York Minster, and (on two sides) a cardinal's hat."

"The Museum of the History of Science, Oxford has a polyhedral sundial in the shape of an octagon that has been attributed to Nicolas Kratzer: The sundial made about 1425 for Cardinal Wolsey. The four-sided base has Wolsey's arms, the arms of York Minster, and (on two sides) a cardinal's hat."