1. The Orangerie of Versailles is a grand greenhouse located within the gardens of Palace of Versailles in France. It was built in 1683-1686 by Jules Hardouin-Mansart, a French architect who also designed other buildings in Versailles. The Orangerie was originally used to house citrus trees during winter. The building measures around 155 meters long and has about 1,200 trees. Today, it is used for exhibitions and events, and it is one of the most visited sites in Versailles.

2. The working hours of the Orangerie of Versailles vary depending on the season. During winter, it is open from 12:00 pm to 5:30 pm from Tuesday to Sunday. During summer, it is open from 8:00 am to 8:30 pm from Tuesday to Sunday. The Orangerie is closed on Mondays. There is no phone number available for the Orangerie of Versailles.

3. To visit the Orangerie of Versailles, visitors need to purchase a ticket to enter the Palace of Versailles. The ticket costs €20 for adults (€18 for online purchase), and it includes the palace, the gardens (except for some musical fountain shows), the Trianon palaces, and the Estate of Marie-Antoinette. Visitors can reach Versailles by train from Paris Montparnasse or Paris Saint-Lazare station. There are also several bus lines and shuttle services available from Paris.