A Gasometer is a large storage tank used to hold gas, typically natural gas or town gas. These structures were commonly used in the 19th and early 20th centuries to manage gas supply for lighting and heating in urban areas. Gasometers can vary in design, but they often feature a cylindrical shape and are built to accommodate changes in gas volume. The operation of a gasometer relies on the principle of gas pressure. As gas is produced, it fills the gasometer, which expands to maintain pressure. When gas is needed, it is released from the gasometer into the distribution system, ensuring a steady supply to homes and businesses.