There were numerous events and situations that brought about Spain's decline during the seventeenth century. They include a series of weak ineffectual kings, financial instability that bankrupted the crown, crippling military loses to other European powers, power struggles, and a fixation on its American colonies that caused it to ignore issues at home.
Diseases brought from Europe for which they had no immunity.
nation unification and expulsion of the Muslim Moors
Ekynxnen
the empire was conquered by the moroccans in the late 1500s.
only two people survived this
they died due to europeans bringing over diseases that the native americans bodies were not adapted to.
Not in Serious Decline but some people began to follow other Religons instead of what the Church of Rome taught (who was headed by the pope). One country who lead the decline of the following of the church of Rome was England who's ruler was Queen Elizabeth I.
contagious Diseases
They were under Mongolian rule
Mercantilism was the economic policy from the 1500s to 1700s. The goal was to build up the state to protect it from warfare. There were many territorial wars in Europe during this time.
It is thought that they lived since the 12th century (1100s) to the end of the 16th century (1500s) Their decline was due to the sudden outbreak of smallpox and typhus.
The Renaissance and the Age of European exploration. (I think)