What is the Antikythera Mechanism, how and when was it discovered, and why is it considered historically significant? Provide a concise summary of these details based solely on the information presented on the homepage of antikythera-mechanism.gr.
Navigate to antikythera-mechanism.gr. Scroll down the homepage to ensure all content related to the mechanism's description, discovery, and significance is visible. Identify and extract information about what the Antikythera Mechanism is designed to do. Locate details regarding its discovery, including the year and the method of discovery. Find the reasons why the mechanism is considered historically important. Synthesize all gathered information into a concise answer.
State that the Antikythera Mechanism is an ancient Greek analogue computer designed to predict astronomical positions and eclipses for calendar and astrological purposes. Identify its discovery in 1901 by sponge divers from the Antikythera shipwreck off the coast of the Greek island of Antikythera. Explain its historical significance by mentioning its complexity and accuracy being far ahead of its time, challenging conventional views of ancient Greek technological capabilities, and being the most complex known ancient device. Confirm that all provided information was obtained exclusively from the homepage of antikythera-mechanism.gr.