Marcus Tullius Cicero served as the Roman Quaestor at Lilybaeum in western Sicily in 75 BC. He was 31, a junior senatorial magistrate, and had been assigned the standard provincial-revenue duties of a Republican quaestor in a substantial Mediterranean grain province. He used his year of provincial authority to undertake one substantial personal historical project: he located the lost tomb of Archimedes, dead at Syracuse for 137 years.
He recorded the discovery in detail in Tusculan Disputations Book V, a philosophical dialogue composed approximately twenty years later (45 BC) at his Tusculum villa, where the Archimedes-tomb anecdote serves as the opening illustration of an argument about the value of the contemplative philosophical life.
What he was looking for
Archimedes had been killed by a Roman soldier in 212 BC during Marcellus’s sack of Syracuse. Marcellus had ordered honours for Archimedes’s burial — a recognition of the mathematician’s role in the defence of the city through the preceding two-year siege — and the burial had taken place at public expense in the Achradina district of Syracuse. The tomb had been marked with a carved relief of a sphere inscribed in a cylinder, with accompanying inscriptions giving the mathematical proportions (the sphere has two-thirds the volume of the circumscribing cylinder, the Archimedean result the mathematician had considered his finest).
The subsequent 137 years of Roman Syracuse had forgotten which tomb was Archimedes’s. The provincial Syracusans Cicero interviewed denied that the tomb still existed; they insisted that the Archimedean burial had been lost to subsequent rural-cemetery expansion.
How he found it
Cicero refused to accept the Syracusan denial. He requested provincial authority to search the relevant rural cemetery (the overgrown Achradina necropolis on the southern edge of the city). He hired a labour party to clear the accumulated bramble and overgrowth on the cemetery’s westernmost margin.
The workers uncovered a small column projecting above the brambles. The column carried the expected cylinder-and-sphere relief and a fragmentary Greek inscription. The Cicero text records his reaction:
Thus the most famous Greek city, once also the most learned, would have forgotten the memorial of its most ingenious citizen, had it not been restored by a native of Arpinum.
The tomb itself was in poor condition — the inscriptions were weathered, the sphere-and-cylinder relief was damaged, and the covering structure had collapsed — but the identification was unambiguous.
What it meant
The Cicero anecdote is the principal documentary source for the physical existence and appearance of Archimedes’s tomb. The subsequent history of the tomb is unknown; no subsequent classical-period source mentions it; no subsequent medieval or early-modern visit to Syracuse identified it.
The 18th-century Bourbon-period Syracuse antiquarians proposed several candidate tombs in the Achradina necropolis; none of them conclusively matches the Cicero description. The standing modern Syracuse ‘Tomba di Archimede’ (in the Grotticelli necropolis north of the modern city) is a Roman-period columbarium of unrelated identity that was mis-identified as the Archimedean tomb by a 19th-century French traveller; the mis-identification has stuck in the subsequent guidebook tradition.
The actual tomb Cicero found in 75 BC is lost again, presumably buried somewhere beneath the modern southern Syracuse urban fabric.
The Archimedes mathematical legacy survived through other channels — the Renaissance and the Heiberg-era recovery of the palimpsest manuscript at Constantinople preserve the mathematical body of work. The tomb is the physical-monument loss that the Cicero anecdote documents: a 19th-century-style cautionary tale about civic memory.