. Conflicts in instrument invention at the Medici court: the pendulum clock, and the Accademia del Cimento.

This essay proposes that the only publication of the Accademia del Cimento, referred to as ,1 Accademia del Cimento, (Firenze: Per Giuseppe Cocchini, 1667). had as one of its main goals the celebration of the House of Medici's paternity of cutting-edge experiments and instruments during the reign of Grand Duke Ferdinando II. These included Ferdinando II's thermometers and hygrometers, Torricelli's experiment and barometer, and Galileo's pendulum as a clock-regulator. It seems that this agenda went unnoticed, not at the time of its initial circulation, but rather in modern historiography. Christiaan Huygens's challenged invention of the pendulum clock provides a case study to explore the agenda of this publication and the problem of defining an invention in seventeenth-century Europe. This paper presents for the first time the document that attests to when the first specimen of Huygens's clock arrived in Florence, disproving the previously believed date of September 1657. The paper argues that over the last two centuries, this error has made the Medici narratives of this dispute appear inconsistent and marginalized them. In light of this new find, they must be reconsidered.