Dewisland

[8] The disestablishment of Deheubarth around it effectively made the Bishop's lands a sovereign state—Dewisland—which was able to boast of being the only Welsh realm never conquered by a foreign invader.

It was not a contiguous realm; Llawhaden, a sizeable possession of the Bishop lying elsewhere in Dyfed, also became part of Dewisland,[9] having received the same treatment by the Normans.

Following the incumbency of Sulien, the chapter had begun a pattern of appointing his close blood relatives as Bishop of St. Davids (first Rhygyfarch, his eldest son, then Wilfred, his brother.

[9] As Marcher Lord, the Bishop was almost sovereign - they had judicial powers over all offences (except high treason), could levy tax, issue charters, raise armies, and start wars.

[9] Initially, St David's remained its civil and ecclesiastical headquarters, and small English-speaking communities began to settle there (as they did at Abercastle and Letterston).

[9] Later, in attempting to assert a number of rights, some of which were only held by Marcher Lords, he came into conflict with the Crown Estate Commissioners, and the matter came to court in 2008.

As Lord of the Manor of the City of St. David's, a title to which the court found that Mr Roberts was entitled, he has the right of moiety of wrecks on the shoreline.