Sant Sebastià del Sull is a ruined Benedictine monastery in Saldes, Berguedà comarca, Catalonia, Spain.
In that year, Sunifred II of Cerdanya gave the land which then helped form a religious community with an abbot and six monks.
The building has a round centralized midsection covered with a dome and a semicircular apse on the eastern side.
It is believed that the structure was covered with a dome made of small blocks, arranged concentrically.
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