Frederick William's successor, Frederick William III, turned the island into a model farm and in 1821–34 had the park redesigned by Peter Joseph Lenné and Karl Friedrich Schinkel, who planned several auxiliary buildings. The king also laid out a menagerie modelled on the Ménagerie du Jardin des Plantes in Paris, in which exotic animals including alligators, buffalos, kangaroos, monkeys, chameleons, wolves, eagles, lions, lamas, bears, beavers and peacocks were housed. This initially stretched between the castle and the "Kavaliershaus", but was altered by Lenné in 1824. Buildings were designed in the Italian villa style and included grottos and an aviary (which still remains today). The number of animals peaked at over 900, from over a 100 species. Frederick William III was very fond of his animals, often feeding many of them personally. He also made his collection accessible to the people of Berlin. However, this created such an onslaught on the small island, that from 1821 the public was allowed on the island only three days a week. Nevertheless, public interest remained so high that the special trains running from Berlin were often overcrowded. In 1830 Harry Maitey, the first native Hawaiian who came to Prussia, was assigned as assistant to the engine master on the island. In 1842, Frederick William IV transferred all the animals to the Berlin Zoo, which opened its gates in 1844 as the first of its kind in Germany.