Antikythera mechanism
The Antikythera mechanism (/ˌæntɪkɪˈθɪərə/AN-tih-kih-THEER-ə) is an ancient Greek hand-powered orrery, described as the first analogue computer,[1] the oldest known example of such a device [...] The instrument is believed to have been designed and constructed by Greek scientists and has been variously dated to about 87 BC