After World War II, the animal park was turned into a model zoo which conformed to new and modern scientific, educational, cultural and aesthetic standards. The animal compounds were enlarged and admitted more light. Buildings from this period include the primate building (1958) and the big jubileum complex, established on the occasion of the 125-year anniversary together with the nocturama (1968), which houses the nocturnal animals. The jubileum complex houses birds of prey and the sea lions. In 1973 a new compound for reptilians was built, and in 1978 a new building for smaller species of monkeys. The older primate building was renovated in 1989. To support its educational mission, the zoo started with group tours and special educational programmes called "zoo classes" in 1969. Around the same time, planetarium exhibits were installed.