Majones is first mentioned in writing in the year 1025 as the birthplace of “Domna Onneka de Maxonis” (Mistress Onneka). In the 11th century, the fortified village of Majones which belonged to the Monasterio de San Martín of Cillas was known as Maxonis or Manxones and was tenanted by Fortun Manxones. Circa 1100, Cillas was amalgamated with San Juan de la Peña Monastery and the small monastery of the Sacred Angel of Majones soon followed. The village of Majones belonged to García de Vera family of the lesser nobility for almost five centuries.

Only one tower remains of this fortified enclave that guarded the Canal de Berdún plains. It has a entrance doorway on the second floor, arrow slits and the remains of crenallations. The tower dates from the 15th century although it is similar in style to those built in the 16th century in the Alto Aragon area. It is likely that this fortress was built on the ruins of an earlier 11th-century, Romanesque castle. The clearing that exists around the tower makes it possible to guess at the layout and dimensions of the fortress. The height of the surviving tower (18 metres) indicates that the fortress must have been of considerable size and comparable to the nearby Castle of Biniés, with which it would have formed a defensive line. The interior has five or six floors, the exact number varying according to the author that describes it.

The castle-fortress of Majones formed a visual line of defence with Villarreal and Huértalo in order to keep watch over the Canal de Berdún area.

Aside from the watchtower and the unusual church of San Salvador of Majones (the only church in the Alto Aragón area with a trilobular apse), the village retains several examples of traditional inglenook chimneys with triangular apertures typical of the Jacetania area. The popular architecture is also worthy of note and the houses near the church are of particular interest.