Most buildings of about 1700 to 1840 are listed, though this will depend in part on how much of the original form and fabric survives.
Caiff rhan fwyaf o adeiladau a godwyd rhwng tua 1700 a 1840 eu rhestru, er y bydd hyn yn dibynnu’n rhannol ar faint o’r ffurf a’r adeiladwaith gwreiddiol sydd wedi goroesi.