1. The Grand Trianon is a small palace located within the estate of the Palace of Versailles in France. It was built in 1687 by King Louis XIV as a private retreat for himself and his mistress at the time, the Marquise de Montespan. The palace is known for its pink marble facade and the beautiful gardens that surround it. The interior of the palace is decorated with luxurious furnishings and artwork. Today, the Grand Trianon is open to the public and visitors can explore the palace and the gardens that surround it.

2. The Grand Trianon is open every day except Mondays from 12:00 pm to 6:30 pm. The phone number for the Palace of Versailles is +33 (0) 130 837 889.

3. The ticket prices for the Grand Trianon vary depending on the time of year and the type of ticket purchased. Tickets can be purchased online in advance or at the entrance to the palace. Visitors can reach the Palace of Versailles by train or by car. The palace is located about 20 kilometers southwest of Paris and there are several train stations within walking distance of the palace. Visitors can also take a bus or taxi from the train station to the palace.