To the north of Castello Sforzesco a green expanse of 47 hectares stretches all the way to Napoleon's neoclassical Arco della Pace, making it the largest park in Milan. The Arena Civica, a small-scale colosseum towards the back, is another addition from the Napoleonic era, and was used for outdoor entertainment. The city's French rulers first carved out the space in the early 19th century, and it was finally landscaped in 1893 by Emilio Alemagna in the then-popular English garden style. Within the park today are a handful of cafés and restaurants, the Triennale Design Museum, the small Acquario, and Giò Ponti's Torre Branca with sweeping views of the city. On sunny days this is the place to be; the park is packed with runners, cyclists, sunbathers, and teenagers kicking around a football.