Carlus Platus, a maker of metal globes in the last quarter of the sixteenth century, is known to us through two fine extant examples of his work.[351] The first of these, inscribed “Romae a. 1578 Car. Pl.,” may be found in the Museo di Strumenti Antichi of Florence, having been added to this collection by its former distinguished director, F. Meucci. The horizon diameter of this armillary sphere is about 21 cm. It has been described as one beautifully constructed of brass and mounted on a carved wooden base. The circle representing the course of the sun and that made to represent the course of the moon are made to revolve on the axis of the ecliptic, and a small ball, of recent construction, representing the earth, is placed in the common center of the armillae, and is made to revolve on the axis of the equator. A dial attached to the axis of the earth below the meridian circle marks the hours, which are engraved on the Arctic polar circle. A few points marked on the colures indicate the position of the principal stars. All of the circles have been carefully graduated. On that one representing the zodiac have been engraved the names of the months and the pictures of the several zodiacal figures, while on the horizon circle are the names of the principal winds in Greek, Latin, and Italian. A second globe of Platus, signed “Carolus Platus Romae Anno 1598,” may be found in the Biblioteca Barbarini of Rome. It is composed of two hollow brass hemispheres, making a ball 14 cm. in diameter, which is surrounded by a brass meridian and a brass horizon circle, the whole resting on a tripod base. It is a fine example of an early metal engraved globe, the representation of the figures of the constellations in particular being done in a very superior manner. On the surface of the sphere the equator, the ecliptic, the equinoctial, and the solstitial colures are represented. The history of the globe seems not to be known, but it is probable that it came to the Barbarini Palace in the time of Pope Urban VIII, who, before filling his pontifical office, was known as Maffeo Barbarini.