 Thomas writes the "Supplementum ad vitam Mariae Oigniacensis" around 1230 at the specific request of the community of Oignies (or rather "forced by the prior of Oignies"), who wanted to promote – thanks to the authorship of Thomas – its image.In addition to being Thomas's first work on a holy woman, the "Supplementum" is also one of the first written records of life in a Beguine community.Marie of Oignies is in fact one of the most famous beguines