She states that the earliest high heel she has seen is depicted on a 9th-century AD ceramic bowl from Persia.
Since the late 18th century, men's shoes have featured lower heels than most women's shoes.
Things started to change when during the European renaissance, the high heel became a status symbol worn by both male and females from the higher social statuses.
Catherine de' Medici, a Franco/Italian noblewoman, pioneered the use of heels as a fashion statement.
Catherine de Medici is believed to have worn them to impress the French court when she wed the Duke of Orleans, the future king.
It is believed to be the first instance when heels were worn however, this reference may be apocryphal, as the development of heels did not begin to come about until the late 1580s, based on iconographic evidence and extant pieces.
Court shoes have conservative styles and are often used for work and formal occasions, while more adventurous styles are common for evening wear and dancing.
The wedge heel is informally another style of the heel, where the heel is in a wedge form and continues all the way to the toe of the shoe.
Also, a 12th-century (AD) sculpture from Ramappa Temple (India) shows a lady, highly clad in jewelry, wearing high heels.
During the 16th century, European royalty, such as Catherine de Medici and Mary I of England, started wearing high-heeled shoes to make them look taller or larger than life.
By 1580, men wore them, and a person with authority or wealth was often referred to as "well-heeled".
Today, high heels are typically worn with heights varying from a kitten heel of 1.5 inches (3.8 cm) to a stiletto heel (or spike heel) of 5 inches (13 cm) or more.
Extremely high-heeled shoes, such as those higher than 6 inches (15 cm), are normally worn only for aesthetic reasons and are not considered practical.