Under the reign of King Sourigna Vongsa (1637–1694) Lan Xang experienced a fifty seven-year period of peace and restoration. During the period the Lan Xang sangha was at the apex of power, drawing monks and nuns for religious study from throughout Southeast Asia. Literature, art, music, court dance experienced a revival. King Sourigna Vongsa revised many of the laws of Lan Xang and established judicial courts. He also concluded a series of treaties which established both trade agreements and boundaries between the surrounding kingdoms.