The bandoneón is an instrument similar to the accordion and concertina. It originated in Germany in the mid-1800s with the original intent of being used for religious music, but became popular in folk traditions of countries such as France and Lithuania. During the 19th century European sailors brought the bandoneón along on trips to Argentina, where the instrument quickly gained popularity. It eventually became one of the central instruments for Tango music. The bandoneón is similar to an accordion in that sound is made by pushing and pulling the instrument, but it does not have piano-like keys like accordions do; it instead has special buttons on either side.