The Minoans primarily wrote in the undeciphered Linear A and also in undeciphered Cretan hieroglyphs , encoding a language hypothetically labelled Minoan . The reasons for the slow decline of the Minoan civilization , beginning around 1550 BC , are unclear ; theories include Mycenaean invasions from mainland Greece and the major volcanic eruption of Santorini
volcanic eruption
Minoan eruption
Minoan civilization