which many volumes are stored lying down and stacked, in the medieval fashion, or with their spines upward, to protect the pages from dust. Some of the volumes doubtless represent his herbarium. Every surface of the vaulted ceiling is occupied with preserved fishes, stuffed mammals and curious shells, with a stuffed crocodile suspended in the centre. Examples of corals stand on the bookcases. At the left, the room is fitted out like a studiolo with a range of built-in cabinets whose fronts can be unlocked and let down to reveal intricately fitted nests of pigeonholes forming architectural units, filled with small mineral specimens. Above them, stuffed birds stand against panels inlaid with square polished stone samples, doubtless marbles and jaspers or fitted with pigeonhole compartments for specimens. Below them, a range of cupboards contain specimen boxes and covered jars. In 1587 Gabriel Kaltemarckt advised Christian I of Saxony that three types of item were indispensable in forming a "Kunstkammer" or art collection: firstly sculptures and paintings; secondly "curious items from home or abroad"; and thirdly "antlers, horns, claws, feathers and other things belonging to strange and curious animals". When Albrecht Dürer visited the Netherlands in 1521, apart from artworks he sent back to Nuremberg various animal horns, a piece of coral, some large fish fins and a wooden weapon from the East Indies. The highly characteristic range of interests represented in Frans II Francken's painting of 1636 (illustration, above) shows paintings on the wall that range from landscapes, including a moonlit scene—a genre in itself—to a portrait and a religious picture (the Adoration of the Magi) intermixed with preserved tropical marine fish and a string of carved beads, most likely amber, which is both precious and a natural curiosity. Sculpture both classical and secular (the sacrificing Libera, a Roman fertility goddess) on the one hand and modern and religious (Christ at the Column) are represented, while on the table are ranged, among the exotic shells (including some tropical ones and a shark's tooth): portrait miniatures, gem-stones mounted with pearls in a curious quatrefoil box, a set of sepia chiaroscuro woodcuts or drawings, and a small still-life painting leaning against a flower-piece, coins and medals—presumably Greek and Roman—and Roman terracotta oil-lamps, a Chinese-style brass lock, curious flasks, and a blue-and-white Ming porcelain bowl. The Kunstkammer of Rudolf II, Holy Roman Emperor (ruled 1576–1612), housed in the Hradschin at Prague, was unrivalled