Why is POP called plaster of PARIS?

The term "plaster of Paris" originates from the historical association of large gypsum deposits and plaster production in Paris. Here are the key points:

• The name "plaster of Paris" comes from the extensive gypsum deposits found in the Montmartre and Menilmontant hills in Paris. These deposits were a significant source of gypsum, which is the raw material used to produce plaster of Paris34.
• During the early 18th century, Paris became a major center for plaster production due to these large gypsum deposits and the city's need for fire-resistant building materials after a major fire in London in 1666 prompted the use of plaster on wooden walls in Paris14.

Even though plaster of Paris is no longer exclusively produced in Paris, the name has persisted due to its historical origins.