27. Polyhedral dial by Nicolaus Kratzer, London, c.1525 Type: instrument Inv. No. 54054 Source: MHS The dial is unsigned but was made for Cardinal Wolsey (bearing his arms, the arms of York Minster and two representations of a cardinal’s hat), almost certainly by Nicholaus Kratzer. He was lecturing at Corpus Christi College, Oxford in the 1520s, under Wolsey’s patronage, on elementary astronomy, the construction of the astrolabe and Ptolemy’s geography.