I am not sure what this question is asking but I think the answer is: There are many things that are made by people and used in the past so it could be numerous objects. So I think that the answer is: Paper(not sure just a guess)
An astrolabe is an instrument formerly used to make astronomical measurements, typically of the altitudes of celestial bodies, and in navigation for calculating latitude, before the development of the sextant. In its basic form (known from classical times), it consists of a disk with the edge marked in degrees and a pivoted pointer.
