This chapter explores the developmental process of a particular set of material objects: those dedicated to the observation, recording, and measurement of Time. Central to the heliocentric model — in both sacred systems of belief and secular applications of science — is the tangible, observable quality of cosmic time: the celestial bodies in motion provide a physical sense of predictability that remains a constant against mutable human conditions and environments. Scholarship has established the connection between the evolution of cognitive function and the creative process of imagination required for the transformation of matter-into-form to convey abstract observations. The astronomical calendars of antiquity unified the earliest recorded observations of the various celestial cycles into a lunisolar model. Cultural migration and assimilation of the Ancient Greek knowledge of practical and theoretical time was a crucial transference of collective ideas.