Sufism, a mystical Islamic tradition, has a long history and a large following among the Sunni Muslims in Pakistan, at both the academic and popular levels. Popular Sufi culture is centered around gatherings and celebrations at the shrines of saints and annual festivals that feature Sufi music and dance. Two Sufis whose shrines receive much national attention are Ali Hajweri in Lahore (c. 12th century) and Shahbaz Qalander in Sehwan, Sindh (c. 12th century).