Once upon a time the tourbillon

The tourbillon turns the heads of enthusiasts and hypnotizes lovers of beautiful mechanics. Many people think they know everything about this watchmaking speciality, as it is often at the heart of the most demonstrative timepieces. However, its history, which began in 1801 with the filing of a patent by Abraham-Louis Breguet, still holds surprises for researchers focusing on the genesis of its development. Discover in three chapters this marvel that escapes universal gravity.