Long after, in the 16th century, Charles the 5th and Phillip the 2nd took control and reconstructed the "castle" and it soon became the Royal Palace of Madrid, Spain. In 1561, Alcazar yet again became a King's residence as Madrid grew in size around the estate. Later, Phillip the 4th constructed most of what is visible today. Sadly in 1734, one of the "best rooms", not actually positive which one, was destroyed in a fire of Christmas Eve. The "castle", Palace, is in excellent shape today and is still fit for a king.
The Mendoza family, that really powerful family, actually only lived in the castle for a century. When one of the "main" members of the family passed, many arguments broke out over who should be able to operate, maintain, and simply, reside in the estate. These feuds brought a lot of damage to the architecture of the castle in 1565. Many, many years later (1914 to be exact), Vicente Lamperez Romera restored the castle to its original glory. Later, in 1931, the castle is put down as a Historical Art Monument. Today, it is owned and protected by "Direccion General de Turismo de la Consejeria de Economia y Empleo de la Comunidad de Madrid" and is in great shape.