 In the early twentieth century, the whole was classified as a National Monument by decree, published on 23 June 1910.The intervention of the government was felt on time, in 1938, at the initiative of the Directorate General for National Buildings and Monuments ( DGEMN).Property of the House of Braganza Foundation, the degradation of the whole continued to progress until the collapse of a cylindrical tower of the palace and, more recently, in February 1998, a wall portion adjacent to the donjon, an element that had been the subject of intervention in the 1980s the new intervention took place in 1999, in charge of DGEMN through its Regional Directorate South, based on traditional building techniques.