The history of Chichen Itza from the end of the 10th to the 15th centuries is complex. The monopolistic authority of military leaders seems to have been mitigated after the city joined the Mayapán League, which included Uxmal. After the 13th century no major monuments seem to have been constructed at Chichen Itza and the city rapidly declined after the fall of Mayapán. In 1556 Bishop Diego de Landa visited the practically abandoned ruins and recorded the legends pertaining to the various monuments. The ruins were not excavated until 1841.