Arena Sferisterio is a historic open-air theater located in Macerata, Italy. Built in the 1820s, it was originally designed for the game of pallone col bracciale, a traditional Italian ball game. The arena features a neoclassical style and can accommodate around 3,500 spectators. Today, the Arena Sferisterio is renowned for hosting the annual Macerata Opera Festival, which attracts visitors from around the world. The venue is celebrated for its excellent acoustics and stunning architecture, making it a popular site for operatic performances and cultural events throughout the summer months.