oops i was wrong theoritical technicality on the vatican,,, it wasnt recognized as an idependent sovereign state until the treaty of Lateran in 1929. Alltough its form of rulership hadnt changed since the papal states were formed, it wasnt technically a nation in its own right until then.

as for Brunei its current goverment wasnt arguably in actual power until 1984 when Brittian granted it full independence and it was several times under the control of foriegn powers such as Brittian, japan and spain at various times throughout its history as were most of the far eastern and african nations at one time or another.

its monarchy may lay claim to a long lineage but its governemnt wasnt an unbroken chain

England is a fluid situation but its chain is mucho solid compared to most at least after Cromwells Government fell and it returned to a monarchy: its eaither when they had the first parliment after Cromwell's Governement fell or later when they became Great Brittian and layed claim to the same governmental system for all of the isles which would arguably be eaither 1707 when it became the United Kingdom of Brittian Scotland and Ireland, or its whenever the last monarch to actually rule over governemnt reigned as opposed to the mp running the entire show and thier own position was regulated to figure head which would be sometime after Victoria. In my opinion just becuase the Monarch stopped utilizing power doesnt mean the parlimentary Governmental system changed, so I am leaning towards the UK now.

I actually really love this topic, thanks again.