Abstract: A horometric device includes a globe supported by an arbor (2) which is driven by means of a pinion (4) by a motor (5) and turns by one rotation in 24 hours. On the interior of the globe (1), a circular flat screen (23) is supported by a horizontal shaft perpendicular to the design, on a cradle (22). An eccentric (21), situated at the end of an inner arbor (19), guided in a fixed pin (20), makes this screen, bearing a lamp (26), oscillate on either side of a central position situated in the rotational axis of the globe (1), in such a way as to represent, on the one hand, day and night, and, on the other hand, the variations in the height of the sun above the equator during the seasons. The arbor (2) is driven by the pinion (17) of the same motor. A time guide-mark (10) bears radial plates (14), inner edges (15) of which are located opposite the meridians of the globe (1). This guide-mark is stationary, and allows the local time to be read at any time at any point of the globe.