This unique manuscript symbolises the early collaboration with the Arab world. Thomas Erpenius became the first professor of Arabic in Leiden in 1613. He had learned Arabic in Paris with the aid of a Moroccan envoy, al-Hajari. This secretary to the Sultan later helped Jacobus Golius, a student of Erpenius when he accompanied a diplomatic mission to Morocco as a translator. Al-Hajari helped Golius acquire Arabic manuscripts, including ‘The Richly Decorated Robes’, which he brought to Leiden with him.