Astrolabe

Octagonal astronomical-geographical table set consisting of cover, middle plate and base connected on one side by hinges. On the top of the lid figural representations of the planets, planets as hour regents and a graphic conversion table for civil, Italian, Babylonian and ancient hours. Inside of lid with horizontal clock and inscription "HOC HORILOGIVM SVI INDICIS VMBRA LINEAM MERIDIANAM CVIVSLIBET REGIONIS AVT VRBIS HIC DESCRIPTAE MONSTRAT"; the clock dial is inlaid with a map of the world, which can be covered by an octagonal inlay plate bearing the inscription "DESCRIPTIO TOAE ITALIAE AC ALTERI PARTIS ID EST GERMANIAE CVM SVIS INSVLIS AC BROXIMIS FINIBVS" and depicting Germany with Prague as the center on the obverse and Italy on the reverse; the cardinal points are indicated on the rim. Center plate with centrally inset compass framed by a 32-piece compass rose with colored prongs; outer rim surfaces engraved with blowing aeolian masks. Underside of center plate with engraved ribbonwork and mauresques; on compass base a lunar clock with moon goddess indicating lunar duration for each night of the lunar cycle and the inscription "IN HIS QVINQVE CIRCVLIS INCREMENTVM ET DECREMENTVM LVNAE ITEM QVOT HORAS ET MINVTA SINGVL : NOCTI : LVC : SIMVL : COMMV : HOR : HIC : INVE". On the inside of the base, a solar disk, a lunar quarter, and a radial Julian calendar with daily saints. On the outside of the base plate a perpetual calendar with Metonic cycle, key numbers of the movable feasts, solar cycle and signs of the zodiac. On the outer rim the signature "CHRISTOPHERVS SCHISSLER FACIEBAT AVGVSTAE VINDELICORVM [Maureske] ANNO DOMINI 1567". belongs to octagonal disc, inv.no. 15438.