1. The Massimo Opera House, also known as Teatro Massimo, is the largest opera house in Italy and one of the largest in Europe. It was built in 1897 in the heart of Palermo, Sicily and has a seating capacity of 1,350. The exterior and interior of the theater are decorated in an ornate neoclassical style, with sculptures, frescoes, and marble columns. The theater has hosted numerous world-class operas, ballets, and concerts over the years, including performances by Pavarotti and Maria Callas. The opening scene of the famous movie \"The Godfather: Part III\" was also filmed here.
2. The Teatro Massimo is open for tours every day except on public holidays and during special events. The ticket office is open Monday to Saturday from 9:30am to 5:30pm. The phone number is +39 091 6053 311.
3. Tickets for tours of the Teatro Massimo can be purchased on their website or at the box office. Prices start at €10 for adults and €8 for children, students, and seniors. The theater is located in the historic center of Palermo, just a short walk from the main train station and the historic Quattro Canti square. Public transportation is also available, with several bus lines stopping nearby.