Which region was described as "the powder keg of Europe" prior to World War I and was also the site of the assassination of the Archduke Franz Ferdinand?

What was constantinoples government

Which best explains how wealthy residents of italian cities contributed to the renaissance? a) wealthy residents bought works of art, which supported artists. b) wealthy residents participated in religion, which supported the church c) wealthy residents participated in music, which supported the arts. d) wealthy residents bought classical books, which supported scholars.

To keep other european powers from threatening its empire in america, spain sent soldiers, settlers, and?