Another historical monument is the Castello dell’Imperatore, the only example of Swabian architecture in this part of Italy. The complex has a square plan with towers on the corners and was designed by Riccardo da Lentini (1237/1248) upon commission by Emperor Frederick II, who died before seeing it completed. The imperial symbols abound here are the sculpted lions that flank the entrance.
But if you prefer the modern side of the town, visit the productive heart of the city with the Museo del Tessuto (textile museum) in an ex-textile factory called Cimatoria Campolmi. This museum preserves documents and samples of the city’s fabric works from the 5th century to the present day, as well as temporary exhibitions.
In Prato there's also a "futuristic" place that collects the contemporary art from all around the world:it's the Pecci Centre for contemporary art. includes more than 1,000 artworks by over 300 artists: sculptures, installations, paintings and videos carried out from the 1950s up to today.