Misc: He belted out hits for Bad Company, The Firm and then went out on his own?

Questions

In 1991 UN Secretary General Javier Perez de Cuellar meets with ---------- in Baghdad.?

In 1237 St Sava, son of ---------- 's king, dies.?

In 1526 Francis I forced to give up claims in---------- , Italy & Flanders.?

In 1742 Edmund Halley genius eclipsed by---------- , dies at 86.?

In 1799 King of Naples flees before the advancing ---------- armies.?