Almonacid Castle is located in the Spanish municipality of Almonacid de Toledo, in the province of Toledo, Castilla-La Mancha, 20 km from the province capital, Toledo.

It rises on a hill that can be seen from dozens of kilometers away because of its strategic location.

The first documentary reference to this castle dates from year 848. According to it,  the castle is of Muslim origin, when it served as a strategic point of surveillance of an ancient road in La Mancha.

In the 11th century the castle became the property of Alfonso VI of Leon as part of the dowry of his wife Zaida, daughter of a Moorish king. Later, in December 1086, it was donated by Alfonso VI to the Cathedral of Santa Maria de Toledo, and it was reformed in the fourteenth century by order of Pedro Tenorio, archbishop of Toledo. It was then used as a prison for Alfonso Enriquez, Count of Gijon and Noreña and bastard son of Henry II of Castile, when he was imprisoned by order of his brother John I of Castile.

In the 18th century the castle became part of the properties of the Counts of Mora and in 1809 it served as a refuge for the troops of General Venegas in the fight against the French in the battle of Almonacid, although the fight was in vain, and the castle was finally conquered by the French troops.

In 1839 the town council of the municipality, given the existing economic needs of the people at the time, allowed the neighbors to remove bricks from the fortress for sale, which implied a great deterioration of the structure which lasts to this day.