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Christopher Wren was an astronomer and mathematician as well as an architect.
Before reshaping London’s skyline, Christopher Wren held professorships in astronomy and investigated the mathematics of curves.
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The astronomer before the architect
Sir Christopher Wren (1632–1723) was no architect with a merely decorative interest in science. Elected a fellow of All Souls, Oxford, in 1653, he became Professor of Astronomy at Gresham College, London, in 1657, then Savilian Professor of Astronomy at Oxford in 1661. He retained the Oxford chair until 1673.
His astronomy involved the difficult business of interpreting what telescopes revealed. Wren studied Saturn and proposed an explanation for its perplexing appearance. When Christiaan Huygens offered the better explanation—a surrounding ring—Wren recognised its superiority. His scientific life included the essential discipline of allowing an attractive idea to yield to a more convincing one.
The geometry of a rolling wheel
Wren also established the length of a cycloid: the curve traced by a point on a wheel’s rim as the wheel rolls along a straight line. One complete arch measures four times the wheel’s diameter. His result appeared in John Wallis’s 1659 treatise on the cycloid—a precise mathematical achievement, rather than a vague reputation for cleverness.
The connection with architecture was less surprising in Wren’s world than it might seem today. Seventeenth-century mathematical arts embraced astronomy, surveying and building. His investigations of vision, drawing and models helped connect scientific enquiry with architectural design; these were neighbouring pursuits, not sealed compartments.
From enquiry to London’s skyline
Wren also helped give experimental science an enduring institutional home. The Royal Society’s founding meeting followed his Gresham College lecture in 1660. He was one of twelve founders, not its solitary creator, and served as president from 1680 to 1682.
The Great Fire of London in 1666 greatly enlarged his architectural opportunities. St Paul’s Cathedral became his best-known building, but its prominence should not eclipse the scientific career that preceded it. Wren’s legacy belongs both to London’s rebuilt skyline and to a culture in which mathematical reasoning could address the heavens, a rolling wheel and the design of buildings.