In part, the strong presence of Sufism has been considered a major enabler of this syncretism between Islam and other religions. Sufism retained strong influence especially among the Islamic scholars arrived during the early days of the spread of Islam in Indonesia, and many Sufi orders such as Naqshbandiyah and Qadiriyya have attracted new Indonesian converts. They have proceeded to branch into different local divisions. Sufi mysticism which had proliferated during this course had shaped the syncretic, eclectic and pluralist nature of Islam in Indonesian during the time. Prolific Sufis from the Indonesian archipelago were already known in Arabic sources as far back as the 13th Century. One of the most important Indonesian Sufis from this time is Hamzah Fansuri, a poet, and writer from the 16th century. The preeminence of Sufism among Islam in Indonesian continued until the shift of external influence from South Asia to the Arabian Peninsula, whose scholars brought more orthodox teachings and perceptions of Islam.