“Hept” and “sept” means seven. Hence, a heptagon is a figure with seven sides and a heptachord is a seven-stringed musical instrument. Additionally, a septennium is a period of seven years. Interestingly, the month of September sued to be the seventh month in the year!
There is a lot of numerical symbolism associated with the number seven. For example, in Christianity there are seven deadly sins—avarice, envy, gluttony, lust, pride, sloth and wrath—and seven virtues—chastity, temperance, charity, diligence, patience, kindness and humility.
Many things come in sets of seven. There are seven days of the week and various categories of the Seven Wonders of the World which describe truly amazing things in both the natural, manmade, present day and ancient world. There is also a cluster of stars called the “Seven Sisters.” Seven is a unique word in the English language because it is one of only two single-digit numbers that has two syllables (the other number is zero).
Below is a list of five facts about the number seven: