Prompted by the Leibniz-Clarke correspondence (1715-1716), various German philosophers tried to reconcile Newtonian physics and Leibnizian metaphysics by offering accounts of what it means for things or their ultimate elements to be ‘in’ space and time at all. The subproject is not concerned with this debate per se, but pursues the efforts on the part of post-Leibnizian German philosophers to resolve the problems it had brought to the fore.