A beautiful city in the northern region of the province of Guadalajara, whose lofty architectural heritage was declared a Historic-Artistic Site in 1965.

The castle, the cathedral, and the main square, or Plaza Mayor, are three spots that the visitor should not miss in the city, although most streets in Sigüenza are filled with gorgeous civil and religious buildings. At present, the castle houses the town's Parador de Turismo. It was built after the Arab invasion in the 8th century, around the same time that the Alcazaba (citadel) was built. Significant parts of the wall are preserved, whose gates and towers begin at the castle. The cathedral, started in 1130, is Romanesque, although it was finished following Gothic canons. Its exterior resembles a medieval fortress, and has Romanesque towers and portico, as well as an impressive rose window. The interior houses the sarcophagus of Martín Vázquez de Arce, also known as "El Doncel de Sigüenza", (the Young Nobleman from Sigüenza). We must also point out the sacristy of Cabezas, built by Covarrubias, and the cloister, the choir, with Gothic stalls, and a very significant art collection, that includes a painting of the Annunciation, by El Greco. At Plaza Mayor, also known as Plaza del Mercado, a Renaissance-style square developed in 1484-1494, we must point out the canons' houses, with rows of balconies and galleries, as well as the City Hall and Puerta del Toril. Other interesting spots include the Romanesque church of San Vicente, the parish church of Santiago, the seminary, the Dolcel House, the Sol lodging house, the church of Ursulinas, the college of Sagrada Familia, the house of the Archdeacon, the shrine of Vera Cruz and the college of Infantes.