The University of Oxford recently announced a £150 million donation from Stephen Schwartzmann, which their press release (PDF) prominently calls "the largest single donation to Oxford University since the Renaissance".
This claim has been repeated by news organisations. For example, the Guardian repeats the claim in full, while the BBC News website goes for the stronger claim that this is "the largest single donation to a UK university" with no timeframe specified.
Is this claim justifiable? The English Renaissance ended in the early 17th Century, and I would expect it to be difficult to make meaningful comparisons between our moden marketised economy and the systems existing then. The Bank of England dates to 1691, and the earliest estimates of inflation I could find with a cursory search extend no earlier than 1751.
The BBC's claim that this is the largest single donation to any UK university since Oxford was founded in 1096 seems even more difficult, if not impossible, to justify. I assume this results from a misquoting of the press release, rather than a novel analysis, but I'm happy to be contradicted.
On what records is the university's claim based? Is it possible to justify the claim using standard economic methods?