Why was lightning considered holy?

Lightening was considered the embodiment of divine power. Places where it struck became the sites of oracles and temples consecrated to Zeus. According to Roman legend, an early king of Alba claimed to be equal, or superior to, the god Jupiter. With the aim of proving his point and impressing his subjects, King Amulius Silvius built machines that imitated both thunder and lightning. Ironically, Amulius and his horse perished when they were struck down by a thunderbolt.

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