Answer:
They built those kind of palaces because they wanted to showcase their power and prestige. Es Escorial in particular was built by Philiph II, one of the most important kings in Spanish history, who presided over the rule of the Spanish Empire when it was in expansion.
These kind of palaces could also instill fear on political opponents, and this is another reason why practically every European powerful monarch built a palace like El Escorial in their respective countries.
Answer:
because many new and advanced technology are invented in this age
I believe the answer is: Ethnocentricity.
ethnocentricity refers to the act of seeing our own culture as inherently superior compared to another culture. This often make people seeing the norms or tradition that exist in other culture by using our own as a standard. The more their culture deviate from ours, the more inferior we think their culture to be.