what about archaeological sources?
The discovery of the Mycenaean civilization by the German amateur archaeologist Heinrich Schliemann in the nineteenth century  and Minoan civilization  provided archaeological evidence
Greek mythology
The discovery of the Mycenaean civilization by the German amateur archaeologist Heinrich Schliemann in the nineteenth century, and the discovery of the Minoan civilization in Crete by the British archaeologist Arthur Evans in the twentieth century, helped to explain many existing questions about Homer's epics and provided archaeological evidence 
who wrote parallel lives of greek and roman mythic and historic figures UNANSWERABLE what literary sources depicted this  greek mythology? Among the earliest literary sources are Homer's two epic poems, the "Iliad" and the "Odyssey".
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Greek mythology [SEP] Archaeological sources
The discovery of the Mycenaean civilization by the German amateur archaeologist Heinrich Schliemann in the nineteenth century, and the discovery of the Minoan civilization in Crete by the British archaeologist Arthur Evans in the twentieth century, helped to explain many existing questions about Homer's epics and provided archaeological evidence for many of the mythological details about gods and heroes. Unfortunately, the evidence about myths and rituals at Mycenaean and Minoan sites is entirely monumental, as the Linear B script (an ancient form of Greek found in both Crete and mainland Greece) was used mainly to record inventories, although certain names of gods and heroes have been tentatively identified.