 The wooden ceiling is decorated in geometrically patterned Moorish latticework.Much of the palace dates from the times of King John I, who sponsored a major building campaign starting around 1415.Most buildings around the central courtyard - called the "Ala Joanina" (John's Wing) - date from this campaign, including the main building of the façade with the entrance arches and the mullioned windows in Manueline and Moorish styles (called "ajimezes"), the conical chimneys of the kitchen that dominate the skyline of the city, and many rooms including