1. Rossio Square, also known as the Praça de Dom Pedro IV, is a historic square located in the heart of Lisbon. It is one of the most important and iconic public squares in the city, and is known for its distinctive black and white cobblestone pattern. The square is surrounded by historical buildings, including Rossio Station and the National Theatre D. Maria II. There is also a bronze statue of King Pedro IV in the center of the square.

2. Rossio Square is open to the public at all times with no admission fee. There is no phone number specifically for the square as it is an open public space.

3. As a public square, there is no ticket information required to visit Rossio Square. The square is easily accessible by public transportation, including the metro and buses. There are several metro stops in the area, including Rossio Station and Restauradores Station.