After giving up his comfortable life, in 1207 Francis gathered together twelve companions who had always followed and disseminated his teachings on obedience, poverty and chastity on which the Franciscan Rule is based. Francis did not adopt the rules of other religious congregations for his own order, but instead wrote an entirely new one. The Rule comprises his teachings and rules for common life. He submitted it to Pope Innocent III for his approval and for permission to preach. Around 1209-1210 the Pope agreed to allow the Franciscans to live evangelical poverty in a radical way. The final version of the Rule was completed by Francis at the Porziuncola. On 29 November 1223, Pope Honorius III approved the document with his Papal Bull Solet annuere. The postage stamp celebrating this occasion shows a painting by artist Giunta Pisano. The work dates around 1230 and is from the Pinacoteca collection of the Vatican Museums.