The Leyden jar is a device that stores electrical charge and is also known as an electrostatic capacitor. It was invented by Pieter van Musschenbroek in 1745 in Leyden, Netherlands. Synonyms for the Leyden jar include the Leyden bottle, the Leyden condenser, and the Leyden phial. Another term for it is the Franklin jar, named after Benjamin Franklin, who also conducted experiments with similar devices. The Leyden jar was an essential component of early electrical experiments and played a role in the development of the first electric battery. Today, capacitors have replaced the Leyden jar in most modern electronic devices.