1. La Scala Opera House, also known as Teatro alla Scala, is one of the most famous opera houses in the world, located in Milan, Italy. It was inaugurated in 1778 and has since been a prestigious venue for opera and ballet performances. The theater is renowned for its excellent acoustics and has hosted many of the world's greatest opera singers, composers, and conductors.

2. The working hours of La Scala Opera House vary depending on the performance schedule. It is best to check their official website or contact them directly for the most up-to-date information. The contact phone number for the theater is +39 02 88791.

3. Tickets for performances at La Scala can be purchased online through their official website or at the box office. Prices vary depending on the seating category and the popularity of the event. The theater is easily accessible by public transportation, including buses and the metro. The closest metro station is Duomo.