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Jesus College is a constituent college of the University of Cambridge. The College's full name is "The College of the Blessed Virgin Mary, Saint John the Evangelist and the glorious Virgin Saint Radegund, near Cambridge". Its common name comes from the name of its Chapel, Jesus Chapel.
The college was established between 1496 and 1516, on the site of the twelfth-century Benedictine nunnery of St Mary and St Radegund by John Alcock, then Bishop of Ely. The cockerel is a symbol of Jesus College, after the surname of its founder, Alcock.
The College is also known for its grounds, which are unlike those of Cambridge’s other old colleges, being much more spacious. Set back from Jesus Lane, all the courts are open on at least one side (with the exception of the Cloister). The main entrance to the College is a walled passage, called the "Chimney" (derived from the French word chemin).
Much of the college is Grade I listed.
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Listed buildings and structures are officially designated as being of special architectural, historical or cultural significance. There are over half a million listed structures in the United Kingdom, covered by around 375,000 listings.
Listed status is more commonly associated with buildings or groups of buildings, however it can cover many other structures, including bridges, headstones, steps, ponds, monuments, walls, phone boxes, wrecks, parks, and heritage sites, and in more recent times a road crossing (Abbey Road) and graffiti art (Banksy 'Spy-booth') have been included.

In England and Wales there are three main listing designations;
Grade I (2.5%) - exceptional interest, sometimes considered to be internationally important.
Grade II* (5.5%) - particularly important buildings of more than special interest.
Grade II (92%) - nationally important and of special interest.

There are also locally listed structures (at the discretion of local authorities) using A, B and C designations.

In Scotland three classifications are also used but the criteria are different. There are around 47,500 Listed buildings.
Category A (8%)- generally equivalent to Grade I and II* in England and Wales
Category B (51%)- this appears generally to cover the ground of Grade II, recognising national importance.
Category C (41%)- buildings of local importance, probably with some overlap with English Grade II.

In Northern Ireland the criteria are similar to Scotland, but the classifications are:
Grade A (2.3%)
Grade B+ (4.7%)
Grade B (93%)

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