Located on a hill, almost on the border of the province of Zamora, and within viewing distance of Villalonso Castle, the primitive Tiedra Castle is already mentioned in the 11th century.
The present castle seems to date from the end of the 13th century and is in a bad state of conservation. It consists of a polygonal enclosure, with a perimeter of 115 meters, equipped with two circular towers. Near one of these there are remains of a ruined wall. This could be a vestige of a second defensive enclosure. There is a dry moat on its western side.
In the 13th century a Don Alonso Téllez de Meneses was the Lord of Tiedra. In the 14th century the Lord of Tiedra was Don Sancho, Count of Alburquerque and brother of King Enrique II de Trastamara. His daughter Leonor, Countess of Alburquerque and married with Fernando de Antequera, inherited from him, amongst other possessions, Tiedra Castle. His sons Enrique and Juan, the Infants of Aragon, inherited from their father the castles of Medina del Campo and Peñafiel Castle. Both the brothers fought against King Juan II of Castile. Therefore this king confiscated Tiedra Castle and handed it over to his favorite Don Alvaro de Luna. During these wars the king incarcerated several of his enemies in Tiedra Castle; under these prisoners were the Count of Haro, the Lords of Batres and Valdecorneja and the bishop of Palencia. After his defeat, in 1445, in the battle of Olmedo, the enemies of the king, handed the castle to Don Pedro Girón, Master of Calatrava as a reward for his help. This Don Pedro Girón is the same one who would, in later years, received Peñafiel Castle from King Enrique IV.
Until the 19th century the castle belonged to ducal house of Osuna.References:
Easter Aquhorthies stone circle, located near Inverurie, is one of the best-preserved examples of a recumbent stone circle, and one of the few that still have their full complement of stones. It consists of a ring of nine stones, eight of which are grey granite and one red jasper. Two more grey granite stones flank a recumbent of red granite flecked with crystals and lines of quartz. The circle is particularly notable for its builders' use of polychromy in the stones, with the reddish ones situated on the SSW side and the grey ones opposite.
The placename Aquhorthies derives from a Scottish Gaelic word meaning 'field of prayer', and may indicate a 'long continuity of sanctity' between the Stone or Bronze Age circle builders and their much later Gaelic successors millennia later. The circle's surroundings were landscaped in the late 19th century, and it sits within a small fenced and walled enclosure. A stone dyke, known as a roundel, was built around the circle some time between 1847 and 1866–7.