It is located in the Plaza del Palacio and this form part of the monumental set declared World Heritage Site by UNESCO.

[4] In the Archbishop's Palace were held the Courts in 1348 and was enacted the Ordenamiento de Alcalá, in that was unified the administration of justice to all the lands that formed the Crown of Castile.

In 1308 the kings Ferdinand IV of Castile and James II of Aragon met here to agree and sign the Treaty of Alcalá de Henares by which were distributed the territories obtained from al-Andalusian Taifas during the Reconquista.

In the 15th century, Archbishop Juan Martínez Contreras (1423-1434) build the east wing, decorated with large Gothic windows, the Anteroom and Hall of the Councils.

The Archbishop's Palace was a barracks for tanks and ammunition, both during and after the Civil War, when, for the failure to prevent flammable materials that were there, there was a big fire.

It is divided into two bodies, being the low of ashlar, with two floors of Plateresque windows that joins an upper gallery of gemanates arches.

[12] In the east wing, where the "Hall of Councils" used to be, underwent a major restoration in its exterior and interior in the 19th century by Juan José Urquijo y Manuel Laredo, following the Neo-Mudéjar style.

[13] Through the Tower XIV visitors can access the Antiquarium and visit some of those aforementioned remains, which have recreated partially the galleries of the Ave Maria, the large Courtyard of Fonseca and the Staircase of Covarrubias.

For decades the performance outside of the play "Don Juan Tenorio" by José Zorrilla was held in Alcalá, around various monuments, and one of it is always the Archbishop's Palace, in some years being staged exclusively there.

In the Archbishop's Palace, many members of the court lived and died, including the Castilian King John I in 1390, after falling off his horse nearby.