He ruled 1216-1272. It was during his reign that Parliament began.
He was succeeded by his son, Edward I.

Reigned 1216-1272. A minor when he took the throne he did not take the reigns
of Government himself until 1234. Baronian discontent simmered, boiling over
in 1258 when Henry facing financial disaster attempted to raise large sums
from his magnates. Reforms were agreed upon but then renouced by Henry. Simon
de Montford lead a rebellion against the King (the Barons Wars) which was
defeated after initial success, thereafter Henry ceeded much of his power to
his son. Burke say he was born 10 Oct 1206 and married 14 Jan, crowned 1216.