Leonardo's Rivellino

46°10′6.5″N 8°47′38″E / 46.168472°N 8.79389°E / 46.168472; 8.79389

Leonardo's Rivellino is a Renaissance fortification adjacent to the Visconti Castle in the Swiss city of Locarno. It was designed and built by Leonardo da Vinci during the period of the Milanese wars of the 16th century. This structure is possibly the only military construction by Leonardo da Vinci that has remained intact to this day without having undergone any modifications or transformations whatsoever and is being studied as an example of Renaissance war technology.

The Rivellino is located northeast of the Visconti Castle, on the Via al Castello. It is mainly visible from the courtyard of the Rivellino art gallery.