Cambridge history runs deeper than 1209. This route traces the Saxon tower of St Bene't's, the Norman Round Church, Cromwell's garrison town, the Fitzwilliam's antiquities and the Cambridge Five spy ring — the layers most college tours skip entirely.
Built around 1130 by the Fraternity of the Holy Sepulchre, one of only four medieval round churches surviving in England, its circular nave modelled on Jerusalem's Holy Sepulchre. Norman drum piers, heavy chevron arches, Victorian restoration of 1841. Open Tue–Sat 10:00–17:00.
The oldest building in Cambridgeshire: the tower dates to roughly 1020, pre-Conquest Anglo-Saxon work with long-and-short quoins and a double-splayed window. The carved lions on the tower arch are late-Saxon. Free entry, daily 09:00–17:00 outside services.
The motte of William the Conqueror's 1068 castle, raised over 27 demolished Saxon houses to control the Cam crossing on the Roman road. Cromwell refortified it in 1643 as a Parliamentarian strongpoint. Ten-metre climb, open all hours, unstaffed.
A complete, unaltered Norman chapel of about 1125 built for the leper hospital outside the town walls, and the site of Stourbridge Fair — medieval England's largest fair, chartered by King John in 1211 and the model for Bunyan's Vanity Fair.
Founded 1816 on Viscount Fitzwilliam's bequest, the Founder's Building of 1848 houses Egyptian coffins from Giza excavations, the Cypriot and Greek collections, and armour. Open Tue–Sat 10:00–17:00, Sun 12:00–17:00, closed Mondays.
The 1874 laboratory where J.J. Thomson found the electron in 1897, Rutherford split the atom in 1932 and Chadwick identified the neutron. Twenty-nine Nobel laureates worked behind this Gothic gateway; the original wooden door and plaque survive on the lane.
In the 1618 Perse School hall on Free School Lane: Napier's bones, orreries, early microscopes and Charles Darwin's own microscope, plus the globes and sundials Robert Whipple gave the University in 1944. Mon–Fri 12:30–16:30.
Kim Philby, Guy Burgess, Donald Maclean, Anthony Blunt and John Cairncross were recruited here in the 1930s, largely through the Apostles society meeting in Trinity rooms. Burgess lived on Trinity's Great Court staircase before defecting to Moscow in 1951.
3,809 US war dead and a 22-metre Wall of the Missing naming 5,127 more, on 30 acres given by the University in 1943. It is the only permanent American WWII cemetery in the British Isles, serving the Eighth Air Force bases across East Anglia. Daily 09:00–17:00.
Four derelict slum cottages on Castle Street knocked together by Jim Ede in 1957 into a lived-in house of Gaudier-Brzeska sculpture and Alfred Wallis paintings, left exactly as he arranged it when he gave it to the University in 1966. House Tue–Sun 11:00–17:00.
The former White Horse Inn, a timber-framed building of about 1600, holding the folk history of the fen town rather than the university: eel-catching gleaves, fen skates, cottage industry tools and the 1930s Kingston Street rent-strike material. Wed–Sat 11:00–16:00.
Common land grazed since the Middle Ages and still under commoners' rights, where cattle graze in summer within 500 metres of the colleges. Midsummer Fair has been held here since a charter of 1211 — one of Europe's longest continuously running fairs.