The castle was intended to be presented as a gift to king Alfonso XIII upon his arrival but destiny had other plans for the castle´s fate. Rospigliosi working hard on the castles construction came across certain building restrictions when he filled with the local municipality to grant him permission to dig a moat around the perimeter of the castle which would in turn serve the function of the installed drawbridge entrance (which was to be the icing on the cake if you will). Unfortunately for Rospigliosi the municipality more than likely having had enough with the elaborate conception of a medieval castle in district denied the grant for a moat, seeing it as excessive.
To make matters worse than they already were, when the construction of the castle was finally completed news of a Spanish revolution was announced with king Alfonso XIII and the Republic overturned. The fall of the Spanish Monarchy led to the inevitable and for obvious reasons cancellation of the king´s scheduled trip to Peru. When Rospigliosi received word on the situation in Spain he decided it was time to cut his loses and fold the cards he had held is hand, seeing no other options for this newly constructed castle Rospigliosi took the only decision he had left and used the castle as his new residence where he and his family resided there after. The castle from that moment on was known as Rospigliosi Castle or Castillo Rospigliosi.
Today the castle is the under the ownership of the Peruvian Airforce (FAP = Fuerzas Aereas del Peru) and is the site of the Airforce´s Escuela Superior de Guerra Aérea or Superior School of Air Warfare.
Here is a link to their site: http://www.fap.mil.pe/instruccion/esfap/nosotros/nosotros.html