Prague Metronome is a 75-foot-tall (23 m) functioning metronome in Letná Park, overlooking the Vltava River and the city center. It was erected in 1991, on the plinth left vacant by the demolition in 1962 of an enormous monument to former Soviet leader Joseph Stalin. The metronome was designed by international artist Vratislav Novak. It may be the largest metronome in the world. Place behind it is now popular among skateboarders.