Majestic architectural ensemble classified as a Cultural Heritage site, composed of a tower from the 16th century, an 18th century palace, a private chapel, interior courtyards, and extensive garden areas. The built area reaches approximately 1,670 m², situated on a plot of 1,163.50 m².The tower, originally a defensive structure in the 12th century and transformed into a stately residence in the 16th century by the Marquis of Alvarado and his wife, María de Velasco - members of a noble lineage linked to the Duke of Frías and the Constable of Castile - is now an exquisite example of Castilian Renaissance architecture. Distributed on four floors with a total surface of 413.95 m², the ground floor stands out, housing a chapel with a ribbed vault and a Calatrava cross sculpted in the central key. Access is through a molded semicircular arch, with latticed windows and original inscriptions from the 16th century.The palace, attached to the tower and built in 1784 by the Marquis of Rivaherrera, adds up to 1,254.70 m² distributed over three floors, connected by an elegant double arcade that leads to a cozy entrance hall.Both buildings are protected by national decree as part of the Catalog of Castles of Spain, guaranteeing their preservation and highlighting their exclusivity. Currently in operation as a hotel.Following a meticulous rehabilitation completed in 2007, the ensemble operates as an exclusive and charming inn, equipped with:11 suites decorated with rustic style and special attention to each detail.Gourmet restaurant with a capacity for 60 diners.Cafeteria-bar.Rooms for events and private meetings.Spacious terrace overlooking the gardens.Independent apartment with 3 bedrooms, 2 bathrooms, and a living-dining room with integrated kitchen (open concept).Open-plan multifunctional space of 240 m² on the upper floor.This property was a resting place for illustrious figures such as Emperor Charles V - who stayed here after arriving in Laredo - and King Ferdinand VII. It also preserves an original document issued by Pope Julius III, granting permission for the celebration of masses in the private chapel, accentuating its historical, spiritual, and symbolic value.Ideal for those looking to develop a boutique hotel project, establish a unique private residence, or have a prestigious institutional headquarters. This historic ensemble combines architecture, legacy, art, and comfort in an incomparable setting.