The accordion was invented in the early 19th century in Europe. Its basic form is believed to have been created in Berlin, Germany, in 1822 by Christian Friedrich Ludwig Buschmann, who initially called his invention the "Handäoline"

. Later, in 1829, the Armenian organ and piano maker Cyrill Demian patented an improved version of the instrument in Vienna, Austria, which he named the "accordion." Demian's design introduced the concept of playing an entire chord with a single key, which was a key innovation for the instrument

. Thus, the accordion's invention is credited to Berlin (Germany) for its earliest form and Vienna (Austria) for the patented version that shaped the modern accordion