The number 7 is an incarnation of the beginning and end and is considered sacred.
For example, in Babylon the seven major deities are worshiped and honored over 7 large celestial bodies: Sun, Moon, Mercury, Venus, Mars, Jupiter and Saturn.
Later they became the names of the days of the week in the Roman calender, making, Sunday – Sun, Monday – Moon, Tuesday – Mars, Wednesday – Mercury, Thursday – Jupiter, Friday – Venus and Saturday – Saturn.
In the Bible we meet the seven generations of the holy family in a fairy tale called ''seven countries'', commonly found in geographic names including, many towns, villages and mountains.
Rome, Prague, Kiev and Moscow are proud to have been built on the 'seven hills'.
The figure seven is associated with many myths, also being mentioned in the bible for very significant reasons such as, God creating the Earth for seven days, 7 colors make the rainbow. The figure appears in many proverbs.
Napoleon also believed in the magic power of the number seven. He built his army based on 7 principles. Napoleon was the head with each part being led by a Marshall, belonging to the Marshall were 7 generals on a 7 platoon.
To this day many scientists around the world deal with the special characteristics of the number seven.