 The Mewlewī Sufi order was founded in 1273 by Rumi's followers after his death.His first successor in the rectorship of the order was "Husam Chalabi" himself, after whose death in 1284 Rumi's younger and only surviving son, [[Sultan Walad]] (died 1312), popularly known as author of the mystical "Maṭnawī Rabābnāma", or the "Book of the Rabab" was installed as grand master of the order.The leadership of the order has been kept within Rumi's family in Konya uninterruptedly since then.