Pareatges of Andorra Historical milestone · la Seu d'Urgell, Alt Urgell, Lleida Image of la Seu d'Urgell, not of the place itself. The pareatges signed in 1278 and on 6 December 1288 between the bishop of Urgell Pere d'Urtx and count Roger Bernat III of Foix divided the sovereignty over the valleys of Andorra. From that medieval pact is born the co-principality that is still in force today. 1278-1288 Photo: Luis Miguel Bugallo Sánchez (Lmbuga) (CC BY-SA 3.0) What to see and do in la Seu d'Urgell