Sarajevo had the first full-time (dawn to dusk) tram line in Europe, and the second in the world. Opened on New Year's Day in 1885, it was the testing line for the tram in Vienna and the Austro-Hungarian Empire, and operated by horses. Originally built to , the present system in 1960 was upgraded to . The trams played a pivotal role in the growth of the city in the 20th century.