An expert in the history of science, Allan Chapman is a past Visiting Gresham Professor and has appeared in numerous television programmes. His books include Gods in the Sky: Astronomy from the Ancients to the Enlightenment and The Victorian Amateur Astronomer.

All our lectures are available for free download from the Gresham College website, in video, audio or text formats:
Gresham College professors and guest speakers have been giving free public lectures in central London since 1597. This tradition continues today and you can attend any of our lectures, or watch or listen to them on our website.

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