The Atheneo of Brescia possesses an armillary sphere, having on one of its armillae an inscription which tells us that it was constructed by Gian Battista Alberti in the year 1688, for Count Martinengo.[85] The graduated horizon circle, on which appear the names of the sixteen principal winds or directions, rests upon two semicircles, which in turn rest on a support of brass ornamented by six allegorical figures. In this supporting base there has been placed a compass. Its graduated hour circle is furnished with a movable index, such as had become common in globe construction. Five prominent circles represent the equator, the tropics, and the polar circles, to which is added a zodiacal band which is graduated and bears the names and the symbolical figures of the twelve constellations, and the names of the months. Two rings for the purpose of indicating celestial latitude and longitude are placed within the above-named circles and carry representations of the sun and the moon. A contemporary of Alberti, Giovanni Maccari of Mirandola, likewise a maker of armillary spheres, is known to us through one only, but a fine example of his work.[86] This sphere belongs to the Liceo Spallanzi of Regio Emilia. The meridian circle, having a diameter of about 16 cm., is graduated both for latitude and co-latitude by fives. Adjusted to this meridian is a circle representing the colures, likewise graduated both for latitude and co-latitude, but by tens, and adjusted to these are the polar circles, the tropics, and the equator. On the zodiacal circle are engraved the names of the twelve constellations, the names of the days, and on the inner surface the inscription “Joannes Maccarius Mirandulanus Feccit 1689.” The supporting base is triangular in shape, having a compass placed in the center. Within the three angles of this base shields have been placed, the one bearing the inscription “Anno Domini 1689,” the second the name “Jo Vulpis Mirandulanus Domᵘˢ,” by whom the work was probably ordered; the third has a representation of a fox, the emblem of the Volpi family. In addition to the above the base is ornamented with a bronze scroll, to the points of which are attached semicircles which support the horizon circle. This circle has a diameter of about 15 cm., on which are engraved the usual zodiacal names and signs, the names of the months, and of the principal winds or directions. An hour circle is placed at the south pole with a movable index, and within, at the common center of the circles, a small sphere to represent the terrestrial globe, through which the polar axis is made to pass.