SBW Stables Theatre, 10 Nimrod Street, Kings Cross. Today, 2pm and 7pm. Tickets: $30-$43. Bookings: (02) 9361 3817 or online. Until May 21. Vitesse Tang: Treasures from the Silk Road Capital During the European Dark Ages, teeming Chang’an, today known as Xi’an (“western peace”), was the greatest metropolis in the world.