Sigtrygg II Silkbeard Olafsson was a Hiberno-Norse king of Dublin of the Uí Ímair dynasty. He was caught up in the abortive Leinster revolt of 999–1000, after which he was forced to submit to the King
A posthumous "Sihtric" coin from the British Museum, minted at Dublin c. 1050
Inch Abbey (Inis Cumhscraigh), plundered by Sigtrygg in 1002
The medieval tower of the stone church of Ardbraccan, County Meath, in which Sigtrygg burned over 200 men
Christ Church Cathedral, founded by Sigtrygg c.1028
Ivar of Waterford was the Norse king of Waterford from at least 969 until his death in the year 1000, and also reigned as King of Dublin, possibly from 989 to 993, and certainly again for less than a
Reginald's Tower in Waterford, believed to have been built by one of Ivar's children or descendants. The topmost part is of later Norman construction.
Sigtrygg Silkbeard (989–1029)