The last major structural additions to Buckingham Palace were made in the late 19th and early 20th centuries, including the East front, which contains the well-known balcony on which the royal family traditionally congregates to greet crowds. The palace has 775 rooms, and the garden is the largest private garden in London. The state rooms, used for official and state entertaining, are open to the public each year for most of August and September and on some days in winter and spring. The money raised in entry fees was originally put towards the rebuilding of Windsor Castle after the 1992 fire devastated many of its state rooms.