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Monastery of San Juan de la Peña (Botaya, Huesca)
Built between the late 10th century and the early 12th century, this religious complex looks like it was carved out from the adjacent Pano mountain. Some of its most ancient rooms include the council room and the lower church, featuring Moorish-influenced Mozarabic decorations typical of those parts of Spain that had been occupied by the Moors. In the 11th century the complex became part of the Benedictine Order and was the first Catholic structure to offer Latin Mass in the whole of Spain.

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