Monastery of Santa María la Real in Obona, Romanesque monastery on Camino Primitivo in Tinéu, Spain

Monastery of Santa María la Real in Obona is a Cistercian complex set near the Camino Primitivo pilgrimage route in Asturias. The buildings display Romanesque features including stone walls, rounded arches, and interconnected spaces such as the church, cloister, and service buildings.

A primitive temple on the site is attributed to Prince Adelgaster, illegitimate son of King Silo, and his wife Brunilde, on 17 January 780. A monastic community is documented from the 11th century, when it came to depend on the monastery of Corias. Construction of the Romanesque church began in the 13th century following Cistercian models, and the house grew into an economic and cultural centre whose monks taught Latin, philosophy and theology. It was declared a national monument on 14 May 1982.

The monastery's name refers to Saint Mary the Royal, and its church keeps a 12th-century Romanesque crucified Christ. The monks ran classes in Latin, philosophy and theology, and improved farming and livestock techniques. The site also holds the oldest known written reference to Asturian cider.

The monastery stands in the village of Obona, in the concejo of Tineo, on the interior route to Santiago; pilgrims were lodged and helped here by the monks. The church keeps its three naves and three circular apses, while the 18th-century cloister and monastic rooms remain unfinished and in ruins, so expect uneven ground. It was declared a national monument on 14 May 1982.

The monastery's ruined 18th-century cloister and monks' quarters, never finished, hold the oldest known written reference to Asturian cider. The church itself keeps a 12th-century Romanesque crucified Christ. The complex was declared a national monument on 14 May 1982.