Who was the Pope during the Spanish Armada?

Answer 1

Pope Sixtus V

Answer 2

Armada is fleet of boats. Perhaps you asking about the Spanish Inquisition.
In which case your answer would be:
The Spanish Inquisition was a legally constituted court decreed by Sixtus IV's
http://en.wikipedia.org/wiki/Spanish_inquisition

Answer 3

Pope Sixtus V.