The decoration over the great gate of St John's, depicting the college arms supported by Yales, surrounded by Tudor and Beaufort symbols, and a host of marguerites and other flowers (a pun on the foundress' name, Margaret Beaufort).
A fine example of the ostentation of arms seen at St John's College in Cambridge. The arms of Lady Margaret Beaufort, foundress of the college is shown in the centre, with two replendent yales supporting the shield. The portcullis is the badge of Lady Margaret and the red rose is the Lancastrian badge and they are shown on a field of marguerites, a pun on her name.
Katherine Swynford: Katherine became the third wife of John of Gaunt, Duke of Lancaster, and their descendants were the Beaufort family, which played a major role in the Wars of the Roses. Henry VII, who became King of England in 1485, derived his claim to the throne from his mother Lady Margaret Beaufort, who was a great-granddaughter of Gaunt and Katherine Swynford.
The Beaufort Portcullis was a very important part of the representation of Henry VII and that of his descendants. Margaret Beaufort, his mother, is a descendant of the first duke of Lancester, John of Gaunt, who was the son of King Edward III.
Tudor Greyhound The greyhound was first adopted by Edward III as a heraldic supporter and was particularly used by his descendants in the House of Lancaster. Henry VII, founder of the Tudor dynasty, was descended from this line, and unsurprisingly, used the greyhound as a supporter of his royal arms and a reminder of his royal lineage.