Upper left-hand quadrant: And whence do we know that Mount Moriah will be restored to its pre-eminence? Because it is said: "The mountain of the Lord's house shall be established as the top of the mountains [Isa. 2:2]".... Midrash of Psalms 68:9
Upper right-hand quadrant: After R. Simeon and R. Ishmael were slain, they brought out for execution R. Akiva ben Joseph, who was capable of expounding the meaning of the crowns on letters and thereby disclosing facets of Torah like those shown to Moses at Sinai. The Ten Martyrs
Lower left-hand quadrant: In the middle of the night the Lord struck down all the first-born in the land of Egypt.... Exod. 12:29
Lower right-hand quadrant: The story of a peddler who went around the villages of Sepphoris hawking his wares, crying, "Who'd like the elixir of life?".... Lev.R.16:2b. Avodah Zara 19b.