Oña is a small town located in the province of Burgos, in the autonomous community of Castile and Leon, Spain. It is situated in the northern part of the province, surrounded by beautiful natural landscapes and historic landmarks. The town of Oña is known for its rich history and cultural heritage. It was founded in the 9th century and has been an important center of religious and political power throughout the centuries. The town is home to several well-preserved medieval buildings, including the Monastery of San Salvador, which dates back to the 10th century and is considered one of the most important monastic complexes in the region.