The stamp issued in 1988
commemorates the 800th anniversary of the establishment of the court
of King Alfonso IX.
IX (1171-1230) was the king of León (1188-1230), succeeding Ferdinand
II. He conquered several Moorish cities in Estremadura and was
frequently at war with Alfonso VIII of Castile. His marriages with
Teresa of Portugal and Berenguela of Castile were both annulled by the
pope. He defeated the Moors at Mérida in 1230. His son by Berenguela,
Ferdinand III, reunited León and Castile in 1230.