Villalonso Castle is one of the best conserved castles in the province of Zamora. The castle is a typical and notable example of 15th-century architecture; its construction may be attributed to Juan de Ulloa and his wife María de Sarmiento, whose coats of arms can be seen above the entrance gate. It played an important role during the siege of the queen Isabel the Catholic on Toro during her war against Juan 'La Beltraneja' and during the comunero rebelion against Carlos V.
In 1235 there was an earlier fortification at this site belonging to the Order of Alcántara. During the wars of the Catholic Kings against the King of Portugal, Villalonso Castle, along with other castles in the area, was in the hands of Pedro de Avendaño, in the name of the Portuguese king. At that time the count of Marialba, having fled the town of Toro, sought refuge in the castle shortly before the conquest of this city by the Castilian forces. The castle also played a role, although of small importance, in the War of the Communities.
The castle consisted of two enclosures and a wide moat still visible although mostly covered up.The outside enclosure has not been preserved. The interior one has been partially preserves. It is square and has cubes in the corners and a Tower of Homage, also square, in the centre of one of the sides, topped with a beautiful running crenellation.
References:Saint-Georges de Boscherville Abbey is a former Benedictine abbey. It was founded in about 1113 by Guillaume de Tancarville on the site of an earlier establishment of secular canons and settled by monks from the Abbey of Saint-Evroul. The abbey church made of Caumont stone was erected from 1113 to 1140. The Norman builders aimed to have very well-lit naves and they did this by means of tall, large windows, initially made possible by a wooden ceiling, which prevented uplift, although this was replaced by a Gothic vault in the 13th century. The chapter room was built after the abbey church and dates from the last quarter of the 12th century.
The arrival of the Maurist monks in 1659, after the disasters of the Wars of Religion, helped to get the abbey back on a firmer spiritual, architectural and economic footing. They erected a large monastic building one wing of which fitted tightly around the chapter house (which was otherwise left as it was).