In the course of the 1st millennium CE Jewish scholars developed an elaborate system of Seven Heavens, their names being Vilon (וילון, also called "arafel"), Raki'a (רקיע), Shehaqim (שחקים), Zebul (זבול), Ma'on (מעון), Machon (מכון), and Araboth (ערבות), where ofanim, the seraphim, and the hayyoth and the throne of the Lord are located.