On June 27 and 28 2009, from midday to 6:00 pm, the Nave opened its doors for a weekend wholly devoted to roller skating. In partnership with Pari-Roller, the association that organises the now famous Friday night roller skating tours through Paris, the Grand Palais offered the public two days in which to discover and try out the pleasures of roller skating. Including an initiation into skating and braking (some 140 pairs of skates were made available to the public), demonstrations, rink-hockey and roller-soccer matches, an exhibition on the history of roller skating, live music… : the free admission and entertainment drew nearly 15,000 visitors, skate fans and amateurs, and also tourists curious to discover the Nave in an environment that was at once festive and friendly.