I was reading through some stuff about San Diego Zoo and noticed that it turns 100 next year, as does another very significant world zoo, Taronga. It prompted me to try to make a list of zoos that have passed the centenary milestone. I'm only formally including zoos that have operated continually on the one site, though I've made notes where I'm aware of zoos that are clearly continuous with earlier zoos at different sites. I'm quite sure I couldn't possibly have found them all with a couple of hours on Wikipedia, so please raise any that I have missed: 1752 - Vienna (opened to the public in 1779) 1794 - Jardin des Plantes 1828 - London 1831 - Dublin 1836 - Bristol 1838 - Amsterdam 1843 - Antwerp 1844 - Berlin 1858 - Frankfurt 1859 - Copenhagen 1860 - Cologne 1861 - Dresden, Mumbai 1862 - Melbourne 1864 - Moscow, Central Park 1865 - St Petersburg, Wroclaw, Hanover, Karlsruhe, Saigon 1866 - Budapest 1868 - Mulhouse, Lincoln Park (Not really happy with this date for Lincoln Park as they mark the founding of the zoo from the donation of a pair of swans to the park. Two swans does not a zoo make. However, the site was clearly being developed as an animal collection from quite soon afterwards.) 1871 - Hong Kong 1872 - Kothen, Roger Williams Park (Providence, US), Lahore 1874 - Basel, Philadelphia 1875 - Buenos Aires, Cincinnati, Buffalo, Binghamton (NY) 1876 - Alipore (Kolkata), Baltimore 1877 - Jaipur 1878 - Leipzig, Gulab Bagh (Udaipur, India. Not sure whether the zoo was founded at this time or just the garden on the same site) 1881 - Wuppertal 1882 - Ueno, Cleveland 1883 - Adelaide 1884 - Lisbon 1888 - Sofia, Oregon 1889 - Helsinki, Atlanta, Smithsonian National Zoo 1891 - John Ball (Grand Rapids, US) 1892 - Barcelona, Mysore 1894 - Henry Doorly (Omaha), Seneca Park (Rochester, US) 1896 - Denver 1897 - Como Park (St Paul US) 1898 - Perth, Pittsburgh 1899 - Rostock, Pretoria (National Zoo of South Africa), Bronx, Woodland Park (Seattle) 1900 - Toledo, Virginia (Norfolk, US) 1901 - Halle 1902 - Potawatomi (South Bend, US) 1903 - Kyoto 1904 - Assimboine Park (Winnipeg, Canada), Saint Louis 1905 - Brandywine (Wilmington, US), Stone Zoo (Massachusetts) 1906 - Wellington, Yangon (Myanmar), Memphis 1907 - Hamburg 1908 - Beijing 1909 - Kiev, Bernburg (Germany), Seoul, Kansas City, Fort Worth 1910 - Parque Centenario (Merida Mexico) 1911 - Rome, Munich, Henry Vilas (Madison, US) 1912 - Riga, Nuremberg, Franklin Park (Boston), Bramble Park (Watertown, US) 1913 - Edinburgh, Berlin Aquarium 1914 - Taipei, Miller Park (Bloomington, US), Audubon, Rosamond Gifford (Syracuse, US), Utica, Point Defiance, San Antonio 1915 - Tennoji (Osaka) Former sites closed, zoos moved to new locations less than 100 years ago: Madrid - original zoo opened in 1770 and was replaced by current site in 1972. Rotterdam - original zoo opened in 1857, moved in 1940 due to damage suffered in WWII. Ragunan Zoo, Jakarta - original zoo opened in 1864. Current site in 1966. Chennai - original zoo opened 1855, current site opened in 1985. Sydney - original zoo in Moore Park opened in 1879, replaced by Taronga in 1916. Toronto - the original Riverview Zoo opened in 1888 and was replaced in 1974. Prospect Park - the original zoo started as an informal menagerie in 1890 and was on another site in Prospect Park. The present zoo opened in 1935. Los Angeles - founded in 1912 as Griffith Park Zoo, moved to another site, also within Griffith Park, in 1966. Burgers - opened in 1913, shifted to current site in 1922. So. What have I missed?