Muhammad increased the importance of the vizier in the Nasrid state. He had only one vizier throughout his long reign, Abu Sultan Aziz ibn Ali ibn al-Mun'im al-Dani, who became his trusted ally. He also served as Muhammad's ambassador to the Marinids, commanded some military operations, and co-signed many royal documents. Muhammad also expanded the Alhambra, steadily establishing a royal residence zone in what was largely a fortress complex built by his father. He continued his father's constructions of a precinct wall surrounding the royal zone, as well as multiple residence buildings and bathhouses. The chronology for each part of the Alhambra during the early Nasrid period is not always clear—partly due to alterations and renovations under later Muslim or Christian rulers—but Muhammad II definitely built the original palace that today becomes the Convent of San Francisco as well as the original Dar al-Mamlaka al-Saida in the Generalife. He also built the Tower of the Ladies ("Torre de las Damas", the site of today's Partal Palace built by his son Muhammad III) and the Tower of the Points ("Torre de los Picos").