Historical Events in 988 AD Mar 30 Boudouin IV with the Beard becomes earl of Flanders Jul 10 The city of Dublin is founded on the banks of the river Liffey Famous People Who Died in 988 AD Mar 30 Arnulf II, count of Flanders (965-988), dies May 6 Dirk II, West Frisian count of Holland May 19 Dunstan[us], English archbishop of Canterbury, dies 987 AD History by Year 989 AD