Seven days of the week, seven colors of the rainbow, seven seas ..... seven dwarves, seven notes of the musical scale, seven year itch ...... Seventh Heaven, seven metals of ancient alchemy, seven planets of ancient astronomy, seven classes of crystals ..... seven chakras, Seven Aztec Caves of Initiation, Magnificent Seven, Seven Samurai ..... Seven Voyages of Sinbad, Seventh Seal, Seven Mysteries of Life ..... Seven Ages of Man, Seven Wonders of the World.

Heptagon Holes No. 1

Seven has an abiding significance in cultures everywhere.

The Seven Muses: History, Poetry, Comedy, Tragedy, Music, Dance and Astronomy.

The Seven Medieval Arts: Grammar, Rhetoric, Logic, Music, Arithmetic, Geometry, and Astronomy - which are also called the Seven Liberal Arts because they are intended to liberate us from a mundane life.

The Bible has thousands of references to seven: Wisdom hath builded her house, she hath hewn out her Seven pillars.
-Proverbs 9:1

All the World's a stage and all the men and women merely players; They have their exits and their entrances; And one man in his time plays many parts, His acts being the seven ages.
-William Shakespeare

In Native American Culture: In our every deliberation we must consider the impact of our decisions on the next seven generations.
- from the Great Law of the Iroquois Confederacy.

One, two, three, four, five, six, seven; All good children go to heaven.
-Children's rhyme

In many societies every seventh year is a "Year of Release". It is the statute of limitations for various crimes and debts, slaves are set free after seven years, planted fields are allowed to rest, etc.

In Greek Mythology, seven is the symbol of the Virgin. It is not possible to construct a perfect heptagon or to divide the circle into seven equal portions using only simple geometer's tools. Hence, seven is indivisible, unconquerable, and virginal.

Nature delights in the number seven.
-Philo Judaeus, Alexandrian philosopher

Heptagon Holes No. 4

Most of the information contained here about the number seven is from "A Beginner's Guide to Constructing the Universe" by Michael S. Schneider. This is a beautifully illustrated and spiritually insightful book about the numbers one through ten.about the numbers one through ten.