Where did the chimney idea come from?

The idea of the chimney originated in medieval Europe as a solution to improve indoor air quality and enhance heating efficiency. Prior to chimneys, open fires were used for cooking and heating, which resulted in smoke filling living spaces. The introduction of chimneys allowed smoke to be vented outside, making homes safer and more comfortable. This architectural innovation evolved over time, leading to the various designs and materials we see in modern chimneys today.