The famous palace built by King Philip II in Madrid is 'El Escorial' in the town of San Lorenzo de El Escorial. It was built in the 16th century. It is the historical residence of the king of Spain, which is situated about 45 km from Madrid.
The official currency of Spain used to be the Peseta and it was Spain's official currency from 1869 to 2002.
Imperfect= Past there for the answer would be
Nosotros Buscavamos la llave