1. Sintra National Palace, also known as Palácio da Vila or Palácio de Sintra, is a medieval royal palace located in the town of Sintra, near Lisbon, Portugal. It was built in the 14th century by the Moors and was later expanded and renovated by various Portuguese monarchs. The palace has an impressive array of architectural styles, including Gothic, Manueline, and Mudéjar. It features numerous rooms with intricate decorations, including the famous Swan Room, featuring a ceiling decorated with swans.

2. The palace is open from 9:30am to 7:00pm from April to September, and from 9:30am to 6:00pm from October to March, with the last admission one hour before closing. The phone number of the palace is +351 21 923 7300.

3. The entrance fee for adults is €10, and for children and seniors it is €8.50. There is also a combined ticket available for €20, which includes admission to the palace and three other nearby attractions. The palace is easily accessible by car, bus, or train from Lisbon.